CA1283018C - Stitchless reinforced corner structure for cloth - Google Patents
Stitchless reinforced corner structure for clothInfo
- Publication number
- CA1283018C CA1283018C CA000538684A CA538684A CA1283018C CA 1283018 C CA1283018 C CA 1283018C CA 000538684 A CA000538684 A CA 000538684A CA 538684 A CA538684 A CA 538684A CA 1283018 C CA1283018 C CA 1283018C
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- Prior art keywords
- cloth
- region
- corner
- stubs
- pair
- Prior art date
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- 239000004744 fabric Substances 0.000 title claims abstract description 89
- 238000002347 injection Methods 0.000 claims abstract description 5
- 239000007924 injection Substances 0.000 claims abstract description 5
- 239000000463 material Substances 0.000 claims abstract description 5
- 230000007547 defect Effects 0.000 description 2
- 230000001965 increasing effect Effects 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000009958 sewing Methods 0.000 description 2
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009740 moulding (composite fabrication) Methods 0.000 description 1
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- Treatment Of Fiber Materials (AREA)
Abstract
STITCHLESS REINFORCED CORNER STRUCTURE FOR CLOTH
ABSTRACT OF THE INVENTION
A stitchless reinforced corner structure for cloth includes a foldable interlining member made of tough plastic material and integrally formed by injection, a pair of folding lines formed on a surface of the interlining member defining a middle region, a left region and a right region, a pair of annular openings respectively provided in an upper portion of the middle region and in an upper potion of the left region, a pair of stubs provided at a lower portion of the middle region, and orifices corresponding to the stubs formed respectively on the left and right region, so that, when the left and right region are folded over the middle region, the orifices and the stubs are closely engaged with each other so as to have a cloth corner tightly secured therein without the need for stitching.
ABSTRACT OF THE INVENTION
A stitchless reinforced corner structure for cloth includes a foldable interlining member made of tough plastic material and integrally formed by injection, a pair of folding lines formed on a surface of the interlining member defining a middle region, a left region and a right region, a pair of annular openings respectively provided in an upper portion of the middle region and in an upper potion of the left region, a pair of stubs provided at a lower portion of the middle region, and orifices corresponding to the stubs formed respectively on the left and right region, so that, when the left and right region are folded over the middle region, the orifices and the stubs are closely engaged with each other so as to have a cloth corner tightly secured therein without the need for stitching.
Description
33~
This inven-tion relates to a reinforced corner structure for cloth, and more particularly to that type of reinforced corner structure fitted in cloth without stitching for facilitating production automation and reducing working time.
Cloth is usually woven with warp and weft.
In order to avoid raveling at cloth corners, a rein-forced stitched portion along -the adjacent edges of a cloth corner is often required. This is particularly true for plastic cloth and canvas used for making tents and covers, of which the corner edges are always folded over and stitched thereat with an opening pro-vided in -the corner and a grommet fixed therein for allowing a cord to be inserted into the grommet and tied at a support. However, as the opening mars the warp and weft structure of the cloth, when the grommet is subjected to pull and drag force, the periphery of the opening will become raveled and eventually break loose, causing the grommet to come out from the open-ing. In order to overcome the above-mentioned short-coming, some manufacturers have made an effort to inset a side string along the adjacent cloth edges for increasing the tensile strength of the cloth edges. However, owing to the different ways of tying the cord, the opening of the cloth will be damaged.
If the cord is tied as a square knot, with two por-tions of the cord respectively kept in close engage-ment with the side string at two sides, when the cord ,.i.~J
c . .~.
~2~33~
is tightened, the tensile pull of the cord will be evenly provided by the two portions of the cord at both sides of the cloth; thus, the strain suffered by both the opening and the grommet can be decreased.
However, if the cord is tied in any simple knot, as it is often done by some careless people, with the cord looped at either one side or at the center of the corner of the cloth, when the cord is tightened, the tensile pull of the cord will be completely absorbed by both the opening and the grommet, so that the latter may easily be damaged and come off from the cloth. For alleviating the effects of the above-said defect, some manufacturers have stitched a tri-; angular cloth piece at the cloth corner for reinforc-ing the area where the grommet is fixed in the open-ing. Nevertheless, the stitching operation of the triangular cloth piece in cloth, particularly for the bulky plastic cloth and canvas used for tents and covers is rather troublesome because no-t only is the side folding operating for a bulky weight cloth diffi-cult, but also an additional two or three assistants are needed to help the sewing operator in moving the cloth during stitching, especially in turning at the cloth corner. In addition to the above-noted problem, as the reinforced triangular cloth piece has to be aligned with the cloth corner, adjustment must be constantly made while stitching, wasting time in the ;~ stitching work. Despite the reinforced triangular ~L2l~33()~
cloth pieee, if the cord is tied in a single knot, damage of the opening and loosening of the grommet will surely oceur~ At present, although further improvement has been tried to bond together the rein-forced triangular cloth piece and the folded edges of the cloth through thermo-pressure bonding operation instead of traditional stitching, this improvement also eneounters a serious problem; i.e., the total thiekness of the bulky layers to be bonded by thermo-pressure bonding. The folded edges of the eloth areof a eertain thiekness, whieh together with the rein-foreed triangular cloth piece, formed of a folded square cloth pieee, makes the total thiekness exeeed the bonding eapability of a high-frequency bonding maehine or other thermo-pressure bondlng maehine. On the other hand, if the eorner edges of the plastic eloth or canvas are bonded through high-frequency or thermo-pressure bonding without the reinforced tri-angular cloth piece (to avoid exeessive thickness), the cloth corner and the cloth surface are easily damaged as noted hereinbefore.
SUMMARY OF THE INVENTION
It is aceordingly a primary object of this invention to provide a stitchless reinforced corner structure for cloth, which reinforced corner structure can be easily fitted in a piece of cloth so as to meet the requirement ' ~2;~!330~
of complete production automation and reduced working time.
It is another object of this invention to provide a stitchless reinforeced corner structure for cloth, by ; 5 which reinforced corner structure, grommet to be fixed in the cloth corner can be consolidated into a ~nified portion with the adjacent edges thereof so as to enable the corner to sustain a cord tied in any way thereat without incurring damage to the cloth corner and the 10 grommet.
It is a further object of this invention to provide a stitchless reinforced corner structure for cloth whereby, ¦ when a cord is installed in the cloth corner and tied to a support, the tensile pull of the cord can be evenly ¦ 15 distributed so as to ensure the life expectancy of the ; ~ cloth~
I These and other objects of this invention are achieved by providing a stitchless reinforced corner tructure, which reinforced corner structure comprises a foldable interlining member made of tough plastic :~ material and integrally formed by injection, with folding lines pr~vided on a surface of the interlining member, . defining a middle region, a left region and a right ~ region, which foldable interlining member can be folded :~ 25 into a triangular shape with orifices and stubs respectively provided in the three regions for being ¦ closely engaged to tightly secure a double-layered cloth ~LZ~3~L8 corner in position, and an opening provided in the interlining member for being fitted with a grommet;
thereby, a quick and strong reinforced cloth corner suitable for all supporting purposes can be achieved accordingly.
Other Eeatures and advantages of this invention will become more apparent in the following detailed description of a preferrecl embodiment when read in conjunction with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWING~
Figure l is an illustrative view of a known ~stitched reinforced corner structure for cloth;
Figure 2A is an illustration of the known reinforced corner structure with a cord tied in a square knot through a grommet fixed in the corner;
; Figure 2B is an illustration of the known reinforced corner structure with a cord tied in a single knot ; throughla grommet fixed in the corner;
Fi~ure 3 is a perspective view of a preferred embodiment of a reinforced corner structure in an unfolded condition according to this invention;
Figure 4 is an illustrative view of the~ preferred embodiment of Fig. 3 in an assembled condition;
Figures 5~ and 5B are illustrative views of the preferred embodiment used on cloth, ¦ Figure 6 is a perspective view of another preferred embodiment of a reinforced corner structure in a ¦ developed condition according to this invention; and ~ 5 . .
`' ~;
~2~ L8 Figure 7 is an illustra-tive view of the preferred embodiment of Fig. 6 in an assembled con-dition.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Figs. 1, 2A and 2B illustrate the prior art.
As shown in Fig. 1, the corner edges 1 and 2, of a canvas or plastic cloth for making tents and covers, are always folded over and stitched thereat with an opening 3 provided in the corner and a grommet 4 fixed therein for allowing a cord to be inserted into the grommet 4 and tied at a support. However, as the opening 3 mars the warp and weft structure of the cloth, when the grommet 4 is subjected to pull and ! drag force, the periphery of the opening 3 will become raveled and eventually break loose, causing the grom-met 4 to come out from the opening 3. In order to overcome the above-mentioned shortcoming, some manu-facturers have made an effort to inset a side string 5 alolg the adjacent cloth edges 1 and 2 for increas-ing the tensile strength of the cloth edges 1 and 2.
However~ owing to the different ways of tying the : cord, the opening 3 of -the cloth will be damaged. If the cord 6 is tied as a square kno-t, as shown in Fig.
2A, with two portions of the cord 6 respectively kept in close engagement with the side string 5 at two sides 1 and 2, when the cord 6 is tightened, the ten-sile pull of the cord 6 will be evenly provided by the two portions of the cord 6 at both sides 1 and 2 .l~, ..
, . ., , .;. ~
1~3~
of the cloth; thus, the strain suffered by both the opening 3 and the grommet 4 can be deereased. How-ever, if the cord 6 is tied in any simple knot, as it is often done by some careless people, with the cord 6 looped at either one side or at the center of the corner of the eloth as shown in Fig. 2B, when the cord 6 is tightened, the tensile pull of the cord 6 will be completely absorbed by both the opening 3 and the grommet 4, so that the latter may eas.ily be damaged and eome off from the cloth. For alleviating the effeets oE the above-said defect, some manufacturers have stitched a triangular cloth piece 7 at the cloth eorner, as shown in Fig. 1, for reinforcing the area where the grommet 4 is fixed in the opening 3.
Nevertheless, the stitching operation of the tri-angular cloth piece in cloth, particularly for the bulky plastie eloth and canvas used for tents and eovers is rather troublesome beeause not only is the side folding operation for a bulky weight cloth diffi-cult, but also an additional two or three assistantsare needed to help the sewing operator in moving the eloth during stitehing, especially in turning at the cloth corner. In addition to the above-noted problem, as the reinforeed triangular eloth piece 7 has to be aligned with the cloth corner, adjustment must be eonstantly made while stitehing, wasting time in the stitehing work. Despite the reinforced triangular cloth piece 7, if the cord 6 is tied in a single knot - 6a -~283~
as shown in Fig. 2B, damage of the opening 3 and loosening of the grommet 4 will surely occur.
Referring to Fig. 3, there is shown a pre-ferred embodiment of a stitchless reinforced corner structure for cloth according to this invention, which corner structure comprises an interlining member 10, which is integrally formed by injection of a tough plastic material. Two folding lines 11 are separately provided on the surface of the interlining member 10 with three regions--a middle region 12, a left region 13 and a right region 14 formed thereon. The left and right regions 13, 14 can be folded over the middle region 12 along the two folding lines 11 with a folded area formed by the left and right regions 13, 14 exactly corresponding (in shape) to that of the middle region 12. An annular opening 121, in an upper por-tion of the middle region 12, and two stubs 122 and 123, on a lower portion of the middle region 12, form-ing an angular shape with the annular opening 121 are respectively provided in the middle region 12. A
round opening 131 corresponding in size to that of the annular opening 121 is provided in an upper part of the left region 13 for being superposed on the annular opening 121 when the left region 13 is folded over the middle region 12. Two orif7ces 132 and 141 corresponding to the stubs 122, 123 are provided re-spectively on a lower part of the left and right regions - 6b -,' ~283C318 ,.
13 and 14 for being engaged with the related stubs 122 and 123 when the left and right regions 13, 14 are folded over the ~iddle region 12 with a clearance 15 defined the left and right regions 13 and 14, and the middle region 12, as shown in Fig. 4, for the passage of cloth.
Referring to Eig. 5, before the reinforced corner structure of this invention is utilized on cloth (especially plastic cloth, canvas, etc.), the edges of the cloth, as usual, are folded for being stitched or bonded together through a high-frequency (thermo-pressure) operation with an opening 3 provided at a proper place in the cloth corner for fitting a grommet therein. This preparatory work of the cloth saves a lot ~;` ¦ of time compared with the conventional work needed for having the cloth ready to be stitched for the reinforced corner structure. The work is performed in an integrated operation without interruption, and the reinforced corner ~;~ structure according to this invention can be easily assembled on the cloth corner as a last stage, by skilled personel. As shown in Fig. 5A, the middle region 12 of the interlining member 10 is placed beneath the cloth corner~ portion, the left and right regions 13, 14 are folded over the cloth corner portion along the folding lines 11 of both regions 13 and 14 with the openings 131, 121 aligned with the opening 3 of the cloth corner portion, and then the interlining member 10 is pressed ¦ against the cloth corner received in the clearance 15 of the interlin;ng member 10 by a pressing machine (not :
~ .
~.Z~3018 shown) with the orifice 141 and the stub 123 and the orifice 132 and the stub 122 closely engaged with each other, and the openings 131, 121 of the left and right regions 13, 14 and the opening 3 of the interlining member 10 also in exact alignment thereat. Finally, a grommet 4 is fitted in the interposed openings 3, 131, 121, as shown in Fig. 5B, and the stitchless reinforced corner structure of cloth is completed~
It shall be appreciated that since the folding of the interlining member 10 defines a clearance 15 between the ; folded left and right regions 13, 14 and the~ middle region 12, the cloth corner can be easily adjusted in position therein in conjunction with the openings 121, 131, and 3 and the orifices 132, 141 and the stubs 122 and 123. Moreover, since the grommet 4 is fixedly fastened on the openings 131 and 121 of the interlining mentber 10, the dragging force coming from the cord tied through the gromment 4 will not be directly applied to the opening 3 of the cloth corner. Therefore, no loosening of the warp and weft of the cloth will corner and the grommet 4 will not come off, and the reinforced corner structure can evenly support the tensile strength of the cloth with great stability and security.
Referring to Fig. 6, there is shown another example of the reinforced corner structure according to this ¦ invention, which reinforced structure also comprises an interlining member 20 integrally formed by injection with ; .
.. ........... .. .. ..
,. . .
. ~
~za~o~
plastic or other tough material, ancl made in a butterfly shape. A folding line 21 is provided in the middle, defining a left region 22 and A right region 23, both of which are in trapezoidal form, and each region has an annular opening 221, 231 provided in an upper portion thereof, corresponding to each other. A pair of stubs 222 are separately provided at a lower portion of the left region 22; while, a pair of orifices 232 are respectively formed in the lower portion of the right region 23, corresponding to the stubs 232. When the two regions 22 and 23 are folded together, as shown in Fig.
7, a clearance 24 is also formed therebetween for permitting the cloth corner to be adjusted in position according to the location of the openings 221, 231 and ¦ 15 the opening 3 of the cloth corner. The assembly and advantages of this embodiment are the same as those of ; the preferred embodiment described hereinbefore and 1~ illustr~ted in Figs. 3 through 5.
Having thus described the invention, it is to be understood that many embodiments thereof will suggest themselves without departing from the scope of this invention. Therefore, it is intended that the specification and drawings be interprated as illustrative rather than in a limiting sense.
.: .. .. ~
. . .
;. :
.,
This inven-tion relates to a reinforced corner structure for cloth, and more particularly to that type of reinforced corner structure fitted in cloth without stitching for facilitating production automation and reducing working time.
Cloth is usually woven with warp and weft.
In order to avoid raveling at cloth corners, a rein-forced stitched portion along -the adjacent edges of a cloth corner is often required. This is particularly true for plastic cloth and canvas used for making tents and covers, of which the corner edges are always folded over and stitched thereat with an opening pro-vided in -the corner and a grommet fixed therein for allowing a cord to be inserted into the grommet and tied at a support. However, as the opening mars the warp and weft structure of the cloth, when the grommet is subjected to pull and drag force, the periphery of the opening will become raveled and eventually break loose, causing the grommet to come out from the open-ing. In order to overcome the above-mentioned short-coming, some manufacturers have made an effort to inset a side string along the adjacent cloth edges for increasing the tensile strength of the cloth edges. However, owing to the different ways of tying the cord, the opening of the cloth will be damaged.
If the cord is tied as a square knot, with two por-tions of the cord respectively kept in close engage-ment with the side string at two sides, when the cord ,.i.~J
c . .~.
~2~33~
is tightened, the tensile pull of the cord will be evenly provided by the two portions of the cord at both sides of the cloth; thus, the strain suffered by both the opening and the grommet can be decreased.
However, if the cord is tied in any simple knot, as it is often done by some careless people, with the cord looped at either one side or at the center of the corner of the cloth, when the cord is tightened, the tensile pull of the cord will be completely absorbed by both the opening and the grommet, so that the latter may easily be damaged and come off from the cloth. For alleviating the effects of the above-said defect, some manufacturers have stitched a tri-; angular cloth piece at the cloth corner for reinforc-ing the area where the grommet is fixed in the open-ing. Nevertheless, the stitching operation of the triangular cloth piece in cloth, particularly for the bulky plastic cloth and canvas used for tents and covers is rather troublesome because no-t only is the side folding operating for a bulky weight cloth diffi-cult, but also an additional two or three assistants are needed to help the sewing operator in moving the cloth during stitching, especially in turning at the cloth corner. In addition to the above-noted problem, as the reinforced triangular cloth piece has to be aligned with the cloth corner, adjustment must be constantly made while stitching, wasting time in the ;~ stitching work. Despite the reinforced triangular ~L2l~33()~
cloth pieee, if the cord is tied in a single knot, damage of the opening and loosening of the grommet will surely oceur~ At present, although further improvement has been tried to bond together the rein-forced triangular cloth piece and the folded edges of the cloth through thermo-pressure bonding operation instead of traditional stitching, this improvement also eneounters a serious problem; i.e., the total thiekness of the bulky layers to be bonded by thermo-pressure bonding. The folded edges of the eloth areof a eertain thiekness, whieh together with the rein-foreed triangular cloth piece, formed of a folded square cloth pieee, makes the total thiekness exeeed the bonding eapability of a high-frequency bonding maehine or other thermo-pressure bondlng maehine. On the other hand, if the eorner edges of the plastic eloth or canvas are bonded through high-frequency or thermo-pressure bonding without the reinforced tri-angular cloth piece (to avoid exeessive thickness), the cloth corner and the cloth surface are easily damaged as noted hereinbefore.
SUMMARY OF THE INVENTION
It is aceordingly a primary object of this invention to provide a stitchless reinforced corner structure for cloth, which reinforced corner structure can be easily fitted in a piece of cloth so as to meet the requirement ' ~2;~!330~
of complete production automation and reduced working time.
It is another object of this invention to provide a stitchless reinforeced corner structure for cloth, by ; 5 which reinforced corner structure, grommet to be fixed in the cloth corner can be consolidated into a ~nified portion with the adjacent edges thereof so as to enable the corner to sustain a cord tied in any way thereat without incurring damage to the cloth corner and the 10 grommet.
It is a further object of this invention to provide a stitchless reinforced corner structure for cloth whereby, ¦ when a cord is installed in the cloth corner and tied to a support, the tensile pull of the cord can be evenly ¦ 15 distributed so as to ensure the life expectancy of the ; ~ cloth~
I These and other objects of this invention are achieved by providing a stitchless reinforced corner tructure, which reinforced corner structure comprises a foldable interlining member made of tough plastic :~ material and integrally formed by injection, with folding lines pr~vided on a surface of the interlining member, . defining a middle region, a left region and a right ~ region, which foldable interlining member can be folded :~ 25 into a triangular shape with orifices and stubs respectively provided in the three regions for being ¦ closely engaged to tightly secure a double-layered cloth ~LZ~3~L8 corner in position, and an opening provided in the interlining member for being fitted with a grommet;
thereby, a quick and strong reinforced cloth corner suitable for all supporting purposes can be achieved accordingly.
Other Eeatures and advantages of this invention will become more apparent in the following detailed description of a preferrecl embodiment when read in conjunction with the accompanying drawings.
BRIEF DESCRIPTION OF THE DRAWING~
Figure l is an illustrative view of a known ~stitched reinforced corner structure for cloth;
Figure 2A is an illustration of the known reinforced corner structure with a cord tied in a square knot through a grommet fixed in the corner;
; Figure 2B is an illustration of the known reinforced corner structure with a cord tied in a single knot ; throughla grommet fixed in the corner;
Fi~ure 3 is a perspective view of a preferred embodiment of a reinforced corner structure in an unfolded condition according to this invention;
Figure 4 is an illustrative view of the~ preferred embodiment of Fig. 3 in an assembled condition;
Figures 5~ and 5B are illustrative views of the preferred embodiment used on cloth, ¦ Figure 6 is a perspective view of another preferred embodiment of a reinforced corner structure in a ¦ developed condition according to this invention; and ~ 5 . .
`' ~;
~2~ L8 Figure 7 is an illustra-tive view of the preferred embodiment of Fig. 6 in an assembled con-dition.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
Figs. 1, 2A and 2B illustrate the prior art.
As shown in Fig. 1, the corner edges 1 and 2, of a canvas or plastic cloth for making tents and covers, are always folded over and stitched thereat with an opening 3 provided in the corner and a grommet 4 fixed therein for allowing a cord to be inserted into the grommet 4 and tied at a support. However, as the opening 3 mars the warp and weft structure of the cloth, when the grommet 4 is subjected to pull and ! drag force, the periphery of the opening 3 will become raveled and eventually break loose, causing the grom-met 4 to come out from the opening 3. In order to overcome the above-mentioned shortcoming, some manu-facturers have made an effort to inset a side string 5 alolg the adjacent cloth edges 1 and 2 for increas-ing the tensile strength of the cloth edges 1 and 2.
However~ owing to the different ways of tying the : cord, the opening 3 of -the cloth will be damaged. If the cord 6 is tied as a square kno-t, as shown in Fig.
2A, with two portions of the cord 6 respectively kept in close engagement with the side string 5 at two sides 1 and 2, when the cord 6 is tightened, the ten-sile pull of the cord 6 will be evenly provided by the two portions of the cord 6 at both sides 1 and 2 .l~, ..
, . ., , .;. ~
1~3~
of the cloth; thus, the strain suffered by both the opening 3 and the grommet 4 can be deereased. How-ever, if the cord 6 is tied in any simple knot, as it is often done by some careless people, with the cord 6 looped at either one side or at the center of the corner of the eloth as shown in Fig. 2B, when the cord 6 is tightened, the tensile pull of the cord 6 will be completely absorbed by both the opening 3 and the grommet 4, so that the latter may eas.ily be damaged and eome off from the cloth. For alleviating the effeets oE the above-said defect, some manufacturers have stitched a triangular cloth piece 7 at the cloth eorner, as shown in Fig. 1, for reinforcing the area where the grommet 4 is fixed in the opening 3.
Nevertheless, the stitching operation of the tri-angular cloth piece in cloth, particularly for the bulky plastie eloth and canvas used for tents and eovers is rather troublesome beeause not only is the side folding operation for a bulky weight cloth diffi-cult, but also an additional two or three assistantsare needed to help the sewing operator in moving the eloth during stitehing, especially in turning at the cloth corner. In addition to the above-noted problem, as the reinforeed triangular eloth piece 7 has to be aligned with the cloth corner, adjustment must be eonstantly made while stitehing, wasting time in the stitehing work. Despite the reinforced triangular cloth piece 7, if the cord 6 is tied in a single knot - 6a -~283~
as shown in Fig. 2B, damage of the opening 3 and loosening of the grommet 4 will surely occur.
Referring to Fig. 3, there is shown a pre-ferred embodiment of a stitchless reinforced corner structure for cloth according to this invention, which corner structure comprises an interlining member 10, which is integrally formed by injection of a tough plastic material. Two folding lines 11 are separately provided on the surface of the interlining member 10 with three regions--a middle region 12, a left region 13 and a right region 14 formed thereon. The left and right regions 13, 14 can be folded over the middle region 12 along the two folding lines 11 with a folded area formed by the left and right regions 13, 14 exactly corresponding (in shape) to that of the middle region 12. An annular opening 121, in an upper por-tion of the middle region 12, and two stubs 122 and 123, on a lower portion of the middle region 12, form-ing an angular shape with the annular opening 121 are respectively provided in the middle region 12. A
round opening 131 corresponding in size to that of the annular opening 121 is provided in an upper part of the left region 13 for being superposed on the annular opening 121 when the left region 13 is folded over the middle region 12. Two orif7ces 132 and 141 corresponding to the stubs 122, 123 are provided re-spectively on a lower part of the left and right regions - 6b -,' ~283C318 ,.
13 and 14 for being engaged with the related stubs 122 and 123 when the left and right regions 13, 14 are folded over the ~iddle region 12 with a clearance 15 defined the left and right regions 13 and 14, and the middle region 12, as shown in Fig. 4, for the passage of cloth.
Referring to Eig. 5, before the reinforced corner structure of this invention is utilized on cloth (especially plastic cloth, canvas, etc.), the edges of the cloth, as usual, are folded for being stitched or bonded together through a high-frequency (thermo-pressure) operation with an opening 3 provided at a proper place in the cloth corner for fitting a grommet therein. This preparatory work of the cloth saves a lot ~;` ¦ of time compared with the conventional work needed for having the cloth ready to be stitched for the reinforced corner structure. The work is performed in an integrated operation without interruption, and the reinforced corner ~;~ structure according to this invention can be easily assembled on the cloth corner as a last stage, by skilled personel. As shown in Fig. 5A, the middle region 12 of the interlining member 10 is placed beneath the cloth corner~ portion, the left and right regions 13, 14 are folded over the cloth corner portion along the folding lines 11 of both regions 13 and 14 with the openings 131, 121 aligned with the opening 3 of the cloth corner portion, and then the interlining member 10 is pressed ¦ against the cloth corner received in the clearance 15 of the interlin;ng member 10 by a pressing machine (not :
~ .
~.Z~3018 shown) with the orifice 141 and the stub 123 and the orifice 132 and the stub 122 closely engaged with each other, and the openings 131, 121 of the left and right regions 13, 14 and the opening 3 of the interlining member 10 also in exact alignment thereat. Finally, a grommet 4 is fitted in the interposed openings 3, 131, 121, as shown in Fig. 5B, and the stitchless reinforced corner structure of cloth is completed~
It shall be appreciated that since the folding of the interlining member 10 defines a clearance 15 between the ; folded left and right regions 13, 14 and the~ middle region 12, the cloth corner can be easily adjusted in position therein in conjunction with the openings 121, 131, and 3 and the orifices 132, 141 and the stubs 122 and 123. Moreover, since the grommet 4 is fixedly fastened on the openings 131 and 121 of the interlining mentber 10, the dragging force coming from the cord tied through the gromment 4 will not be directly applied to the opening 3 of the cloth corner. Therefore, no loosening of the warp and weft of the cloth will corner and the grommet 4 will not come off, and the reinforced corner structure can evenly support the tensile strength of the cloth with great stability and security.
Referring to Fig. 6, there is shown another example of the reinforced corner structure according to this ¦ invention, which reinforced structure also comprises an interlining member 20 integrally formed by injection with ; .
.. ........... .. .. ..
,. . .
. ~
~za~o~
plastic or other tough material, ancl made in a butterfly shape. A folding line 21 is provided in the middle, defining a left region 22 and A right region 23, both of which are in trapezoidal form, and each region has an annular opening 221, 231 provided in an upper portion thereof, corresponding to each other. A pair of stubs 222 are separately provided at a lower portion of the left region 22; while, a pair of orifices 232 are respectively formed in the lower portion of the right region 23, corresponding to the stubs 232. When the two regions 22 and 23 are folded together, as shown in Fig.
7, a clearance 24 is also formed therebetween for permitting the cloth corner to be adjusted in position according to the location of the openings 221, 231 and ¦ 15 the opening 3 of the cloth corner. The assembly and advantages of this embodiment are the same as those of ; the preferred embodiment described hereinbefore and 1~ illustr~ted in Figs. 3 through 5.
Having thus described the invention, it is to be understood that many embodiments thereof will suggest themselves without departing from the scope of this invention. Therefore, it is intended that the specification and drawings be interprated as illustrative rather than in a limiting sense.
.: .. .. ~
. . .
;. :
.,
Claims (4)
1. A reinforced corner structure for cloth comprising:
a foldable interlining member made of tough plastic material and integrally formed by injection, comprising a pair of folding lines separately provided on a surface of said interlining member dividing said interlining member into three regions, a middle region, a left region and a right region, wherein each of said left and middle regions has an annular opening provided in an upper portion, corresponding to each other, and said left and right regions can be folded over said middle region so as to form a consolidated truncated triangle-shaped interlining member with a clearance defined between said regions for allowing a cloth corner to be adjusted therein before being pressed together therewith; whereby, a strong and durable stitchless reinforced corner structure can be achieved for evenly supporting the tensile strength of the cloth corner.
a foldable interlining member made of tough plastic material and integrally formed by injection, comprising a pair of folding lines separately provided on a surface of said interlining member dividing said interlining member into three regions, a middle region, a left region and a right region, wherein each of said left and middle regions has an annular opening provided in an upper portion, corresponding to each other, and said left and right regions can be folded over said middle region so as to form a consolidated truncated triangle-shaped interlining member with a clearance defined between said regions for allowing a cloth corner to be adjusted therein before being pressed together therewith; whereby, a strong and durable stitchless reinforced corner structure can be achieved for evenly supporting the tensile strength of the cloth corner.
2. A reinforced corner structure according to Claim 1 wherein said interlining member further comprises a pair of stubs separately provided at a lower portion of said middle region, and a pair of orifices corresponding to said stubs respectively provided in a lower portion of said left region and right region, so that, when said left and right regions are folded over said middle region, said stubs can be suitably engaged in said orifices so as to keep the cloth corner in position tightly upon the cloth and the interlining member being pressed together, eliminating the need for stitching.
other.
other.
3. A reinforced corner structure according to Claim 1 wherein said foldable interlining member includes a folding line defining said interlining member into a left region and a right region, congruent to each other, and both said region having an annular opening provided in an upper portion, corresponding to each other, so that when said left and right regions are folded together, said annular openings are uniformly aligned thereat, and a clearance is defined therebetween for adjusting the cloth corner therein.
4. A reinforced corner structure according to Claim 3 wherein said left region includes a pair of stubs separately provided at a lower portion thereof, and said right region includes a pair of orifices respectively provided in a lower portion thereof, corresponding to said stubs, so that, when said left and right regions are pressed together, said stubs and orifices can be closely engaged with each other for tightly securing the cloth corner in position therein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000538684A CA1283018C (en) | 1987-06-03 | 1987-06-03 | Stitchless reinforced corner structure for cloth |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CA000538684A CA1283018C (en) | 1987-06-03 | 1987-06-03 | Stitchless reinforced corner structure for cloth |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA1283018C true CA1283018C (en) | 1991-04-16 |
Family
ID=4135810
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA000538684A Expired - Lifetime CA1283018C (en) | 1987-06-03 | 1987-06-03 | Stitchless reinforced corner structure for cloth |
Country Status (1)
| Country | Link |
|---|---|
| CA (1) | CA1283018C (en) |
-
1987
- 1987-06-03 CA CA000538684A patent/CA1283018C/en not_active Expired - Lifetime
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| Date | Code | Title | Description |
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