US3776158A - Sewing machine, in particular for making the edge on the type of shoes commonly known as mocassins - Google Patents

Sewing machine, in particular for making the edge on the type of shoes commonly known as mocassins Download PDF

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Publication number
US3776158A
US3776158A US00304658A US3776158DA US3776158A US 3776158 A US3776158 A US 3776158A US 00304658 A US00304658 A US 00304658A US 3776158D A US3776158D A US 3776158DA US 3776158 A US3776158 A US 3776158A
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Prior art keywords
feed dog
pieces
needle
machine
movement
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Expired - Lifetime
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US00304658A
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English (en)
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A Zechini
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Individual
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Individual
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    • D—TEXTILES; PAPER
    • D05—SEWING; EMBROIDERING; TUFTING
    • D05B—SEWING
    • D05B15/00—Machines for sewing leather goods
    • D05B15/02—Shoe sewing machines
    • D05B15/025—Shoe sewing machines for sewing moccasin-type seams

Definitions

  • a machine for sewing a binding to a vamp in making mocassins has a throad plate on which the pieces to be joined rest, a reed dog engageable with the work and having a rotary motion in the exit direction of the work and a second feed dog having an oscillating movement about an axis approximately perpendicular to the axis of the needle and synchronized with the movement of the first feed dog.
  • the second feed dog cooperates with the first feed dog in moving the pieces to be joined and in penetrating between the folds so as to regulate the depth and'width of the edge made on the inocassin.
  • means operating in synchronism with the reciprocation of the needle is provided for lifting the presser foot from the work while it is being moved.
  • the present invention relates to a sewing machine, in particular for making the edge on the type of shoes commonly know as mocassins.
  • edge on mocassins is made by manually sewing binding to a vamp in such a way. that the border of the vamp penetrates inside the folded over strip of binding.
  • the stitch is formed by interlacing the upper thread carried by the needle which moves up and down across the part to be sewn, with the lower thread contained in the bobbin which undergoes a reciprocating or rotatory motion through the loop formed by the upper thread;
  • a special device puts them under tension whilst another device, commonly known. as a feed dog, causes the part to be sewn to move-for- -ward by an amount corresponding to the length of the stitch.
  • the main object of this invention is to make it'possible'for the edge on mocassins to be, stitched mechanically in a considerably shorter space oftime than would be required to perform the same operation manually orv with traditional machines.
  • Afurtherobject is to provide a uniform stitch in such a way that the edge is always the same thickness and the same depth all along its length.
  • a .further object is to provide stitching in which the tension on the thread is uniform-right along the edge
  • an essential feature 'of the machine being that it comprises a second feed dog positioned with its axis in a direction almost perpendicular to the axis of the needle and provided with a circular oscillating movement on a plane perpendicular to the working directrix of the needle synchronized with the movement of the first feed dog, the said second feed dog being suitable to cooperate with the first feed dog in moving the pieces and in penetrating between the folds so as to regulate the depth and the width of the edge being made.
  • the machine forming the subject of the present invention is provided with a device for automatically removing the presser foot of the machine from the level of the pieces to be joined whilst the said pieces are being moved, this device being dependent on the movement of the needle carrying shaft and operating in timing with the reciprocating movement of the needle.
  • FIG. 1 is a perspective view, looking upwards, of a section of the machine forming the subject of the invention, with particular emphasis placed on the two devices for moving along the parts to be sewn;
  • FIG. 2 is a perspective view of the two edges of the pieces to be joinedtogether inserted in between the devices which move them along;
  • FIG. 3 diagrammatieally illustrates the operational phases for the two devices which move the pieces along.
  • a sewing machine 1 is provided with an electric motor 2 which is suitably carried by the machine support structure.
  • the shaft of the motor 2 has a grooved wheel 44 keyed on to it and this is mechanically connected by means of a belt 5 to a grooved wheel 6 mounted on a main shaft 7 which provides the motion to all the moving parts on the sewing machine,such as the needle 8 which undergoes a horizontal reciprocating motion and axfeed dog 9 operating in a position which is almost on the same plane as the needle and provided with a rotary motion.
  • the feed dog 9 is housed inside a hollow tubular body 10 and is arranged in such a way thatwhilst it is moving it goes fully below the surface of the tubular body 10 when the needle is moving downwards and is passing through the leather but rises and movesoutside, through a slot in thetubular body, when the needle is lifted away from the sewn leather.
  • the feed dog9 moves the pieces along in the-direction of the arrow f, then passes below the surface of the tubular body and returns to its former position by rotating in the opposite direction to that of the arrow f, after which'it returns to its former departure position.
  • a foot which keeps the leather pressed up against the lateralsurface of the tubular body 10 whilst thestitching is in progress.
  • the foot 1 1 can be manually lifted at the commencement of the stitching operation by means of a take-up lever 12 which operates on a presser bar 13 to which the foot is connected.
  • the rod 13 is extended to exit from the needle carrying head of the machine and at one extremity it is connected to an arm 14 perpendicular to the said rod 13.
  • the base structure 4 carries all the mechanical connections through which the movement is passed to a second feed dog 16, the purpose of which will be claritied in due course.
  • the main shaft 7 through a crown wheel and pinion, moves a driven shaft 18 suitably carried by the structure 4.
  • a cam 19 is rigidly mounted on the lower extremity of the shaft 18 which engages with a forked lever 20 pivoted at 20a to the base structure 4.
  • the rear extremity of the lever 20 is fastened at 20b to one end of an oscillating arm 21 to which a second arm 22 is connected.
  • the arm 22 engages at one end with a lever 23 pivoted to the base structure 4.
  • the other end of the oscillating arm 21 engages at 21a with the end of a lever 24 integral with a shaft 25 which is also carried by the base structure 4.
  • the body 29 of the feed dog 16 is provided with an axial slot 29a inside which is housed a stud 30 connected to the base structure 4 in such a way that it is able to rotate, the purpose of which is to carry the said body 29.
  • the rear end of the body 29 is pivoted at 50 in an almost middle part of the arm 26.
  • a lever 31 is connected at 32 to a shaft 35 carried, in such a way that it is able to rotate, by the base structure 4 to which a tie rod 33, more about which will be said in due course, is connected.
  • a further lever 34 is fixed to a shaft 36 carried, in such a way that it is able to rotate, by the base structure
  • the said lever 34 has a stud 37 pivoted on to it and this works in conjunction with an end of the arm 26.
  • a spring 38 is fastened to the lever 34 and to the lever 31 in such a way as to keep them close together in order to obtain a grip on the end of the arm 26.
  • a second lever 39 connected to the shaft 35 is subjected to the action of a spring 40, more about which will be said in due course.
  • the feed dog 16 serves as a proper control unit for regulating the working position of the vamp and binding.
  • the feed dog 9 whilst the feed dog 9 undergoes, as stated above, a rotatory movement, the feed dog 16, on account of the presence of the cam 19 and of the lever 20 which cause the shaft 25 to rotate in a reciprocating fashion, is provided with a circular oscillating motion in the direction of the arrows 103 and 104 in time with the movements efiected by the feed dog 9.
  • the presence of the feed dog 16 ensures that the edges of the vamp and binding be infed perfectly and allows, particularly where there are curvatures along theedge being made, the extema] part to be better pulled whilst the forming operation is being carried out which is advantageous from the point of view of profiling the edges.
  • a spigot 45 fixed to the tubular body 10 operates in contrast with the feed dog 16 and this ensures that the edges through which the needle 8 has to pass during the stitching operation be firmly positioned.
  • FIG. 3 there is a graph which shows the displacements the feed dog 9 and the feed dog 16 undergo during the period of time in which the main shaft 7 completes one complete revolution.
  • the parts shown with phantom lines indicate the non-operative phases of the feed dogs.
  • Sewing machine in particular for making the edge on the type of shoes commonly known as mocassins, of the type comprising a feed dog located in the direction of the needle, below the throat plate on which the pieces to be joined together rest, the said feed dog being provided with a rotary motion in a direction coinciding with the exit direction of the pieces, an essential feature of the machine being that it comprises a second feed dog positioned with its axis in a direction almost perpendicular to the axis of the needle and provided with a circular oscillating movement on a plane perpendicular to the working directrix of the needle synchronized with the movement of the first feed dog, the second feed dog being suitable to cooperate with the first feed dog in moving the pieces and in penetrating in between the folds so as to regulate the depth and the width of the edge being made.
  • Machine according to claim 1 wherein provision is made for a device to automatically remove the presser foot of the machine from the level of the pieces to be joined whilst the said pieces are being moved, this device being dependent on the movement of the needle carrying shaft and operating in timing with the reciprocating movement of the needle.

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  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)
  • Footwear And Its Accessory, Manufacturing Method And Apparatuses (AREA)
US00304658A 1971-11-08 1972-11-08 Sewing machine, in particular for making the edge on the type of shoes commonly known as mocassins Expired - Lifetime US3776158A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT3560/71A IT940258B (it) 1971-11-08 1971-11-08 Macchina per cucire in particolare per la realizzazione del bordo del le scarpe comunemente denominate mocassino

Publications (1)

Publication Number Publication Date
US3776158A true US3776158A (en) 1973-12-04

Family

ID=11109709

Family Applications (1)

Application Number Title Priority Date Filing Date
US00304658A Expired - Lifetime US3776158A (en) 1971-11-08 1972-11-08 Sewing machine, in particular for making the edge on the type of shoes commonly known as mocassins

Country Status (7)

Country Link
US (1) US3776158A (it)
JP (1) JPS4857740A (it)
DE (1) DE2253920A1 (it)
ES (1) ES408364A1 (it)
FR (1) FR2160073A5 (it)
GB (1) GB1405917A (it)
IT (1) IT940258B (it)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4289083A (en) * 1978-11-30 1981-09-15 Mario Ciucani Automatic machine for zig-zag stitching of tubular elements
US4719867A (en) * 1986-01-22 1988-01-19 Necchi Societa Per Azioni Lower wheel fabric feeding device in a column sewing machine
WO1996020306A1 (en) * 1994-12-23 1996-07-04 Mario Ciucani Improved device for sewing two articles, in particular leather articles, with overlapped edges

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4274345A (en) * 1978-02-06 1981-06-23 Kochs Adler Ag Machine for sewing together workpiece parts having edges of equal or unequal length by means of a bead seam
JPS56104692A (en) * 1979-09-07 1981-08-20 Ciucani Mario Box calf hemming sewing machine for moccasin as popular name
CN112726033A (zh) * 2020-12-23 2021-04-30 岑佰丰 一种皮革边缝制作的智能走线载具工装

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2149456A (en) * 1934-06-30 1939-03-07 United Shoe Machinery Corp Sewing machine
US2159416A (en) * 1937-06-12 1939-05-23 Patent Button Co Folding and pressing attachment for sewing machines
US2695579A (en) * 1952-11-07 1954-11-30 United Shoe Machinery Corp Shoe sewing machine

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2149456A (en) * 1934-06-30 1939-03-07 United Shoe Machinery Corp Sewing machine
US2159416A (en) * 1937-06-12 1939-05-23 Patent Button Co Folding and pressing attachment for sewing machines
US2695579A (en) * 1952-11-07 1954-11-30 United Shoe Machinery Corp Shoe sewing machine

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4289083A (en) * 1978-11-30 1981-09-15 Mario Ciucani Automatic machine for zig-zag stitching of tubular elements
US4719867A (en) * 1986-01-22 1988-01-19 Necchi Societa Per Azioni Lower wheel fabric feeding device in a column sewing machine
WO1996020306A1 (en) * 1994-12-23 1996-07-04 Mario Ciucani Improved device for sewing two articles, in particular leather articles, with overlapped edges
US5738026A (en) * 1994-12-23 1998-04-14 Ciucani; Mario Device for sewing two articles, in particular leather articles with overlapped edges

Also Published As

Publication number Publication date
IT940258B (it) 1973-02-10
ES408364A1 (es) 1975-11-16
DE2253920A1 (de) 1973-05-17
GB1405917A (en) 1975-09-10
FR2160073A5 (it) 1973-06-22
JPS4857740A (it) 1973-08-14

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