ES2675103T3 - Pressing finger for a cigarette lighter - Google Patents

Abstract

Pressing finger (8) for a cigarette lighter comprising a pressing finger arm (6) and a pressing finger platform (7) and which is configured for guiding a wick during the formation of a coil (4) in a cigarette lighter, the clamping finger platform (7) presenting a hole (11, 11b, 11c, 11d) for the passage of a wick (2, 2b, 2c, 2d), which in the direction of the fibers (16, 16b, 16c, 16d ) of the wick (2, 2b, 2c, 2d) through the hole (11, 11b, 11c) has a longitudinal expansion (Lb, Lc, Ld) and, transversely with respect to the direction of the fibers (16, 16b, 16c, 16d), a transverse expansion (Qb, Qc, Qd) of the wick (2, 2b, 2c, 2d), and a groove (12, 12b, 12c, 12d) that flows into the hole (11, 11b, 11c, 11d) for the introduction of a wick (2, 2b, 2c, 2d) into the hole (11, 11b, 11c, 11d) that forms with the direction of the fibers (16, 16b, 16c, 16d) of the wick (2, 2b, 2c) an angle (W) of less than 45 °, characterized in that the longitudinal expansion (Lb, Lc, Ld) of the hole (11, 11b, 11c, 11d) is greater than the transverse expansion (Qb, Qc, Qd) and because the distance (Ab, Ac, Ad) between the mouth area (19b, 19c) of the groove (12, 12b, 12c, 12d) and the end of the longitudinal expansion (Lb, Lc, Ld) oriented towards the arm of the clamping finger (6) is in the direction of the fibers (16, 16b, 16c) of the wick (2, 2b, 2c) greater than half of the transverse dilatation (Qb / 2, Qc / 2, Qd / 2)

Description

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DESCRIPTION

Pressing finger for a cigarette lighter

The present invention relates to a clamp finger for a cigarette lighter comprising a clamp finger arm and a clamp finger platform and which is configured for guiding a wick during the formation of a coil in a burner. The clamping finger platform has a hole for the passage of a wick which, in the direction of the fibers of the wick through the hole, has a longitudinal expansion and, transversely with respect to the direction of the fibers of the wick, a transverse expansion . The clamping finger platform also has a groove leading to the hole for the introduction of a wick into the hole that forms an angle of less than 45 ° with the direction of the fibers of the wick.

A cigarette lighter, also called a flyer, transforms a ribbon of manuar into a wick that is wound in the so-called flyer coils. These flyer coils can be subsequently transformed into yarn in ring spinning machines. In the lighter the manuar tape passes first through a manuar. The wick is then placed, by means of the so-called flyer wings that revolve around the flyer coil, in the flyer coil. This gives the wick at the same time the necessary dilation. To distribute the wick in the longitudinal direction in the coil, the coil can be moved in the direction of the axis of rotation of the flyer wings. To guide the wick, a pressing finger is arranged on the flyer wing.

When the flyer coil reaches a predetermined diameter, the wick separates automatically. For this purpose a wick reserve with a smaller twist is created. The wick reserve can be deposited by the upper or lower end of the flyer coil. As a result of an appropriate relative movement between the flyer coil and the wing the wick breaks. A relative movement can be produced by an upward or downward movement of the flyer coil or by a rotation of the wings and / or the coil.

Pressing fingers for burners have been known for a long time and are described, for example, in US 2,046,376. Its clamping finger platform has an elongated hole through which the wick is conducted. In the wick inlet zone the cross-section of the hole is larger than in the outlet zone, whereby a wick compaction is achieved. To facilitate the introduction of the wick into the elongated hole, a groove is provided that leads to the elongated hole, which develops perpendicular to the direction of the wick fibers and which is oriented upward in the direction of fixing the wings of flyer Therefore, to separate the wick in order to avoid unraveling the wick, a movement must be produced with which the coil separates from the wings, that is, the coil is lowered for separation. This means that the separation of the wick has to occur at the bottom of the coil and that a wick reserve is placed by the lower end of the coil. If a wick reserve were placed by the upper end of the coil and if the separation occurred by raising the coil, the wick would necessarily leave the hole through the vertical groove.

Document DE 30 23 241 A1 discloses a clamping finger whose clamping finger platform has a circular hole. The groove forms a sharp angle with the direction of the wick fibers and is arranged on the upper side of the platform. As a consequence of the oblique orientation of the groove, the unwinding of the wick during the separation of a wick reserve arranged by the upper edge of the coil would certainly be difficult, although in the end it could not be avoided.

EP 0 686 713 B1 discloses a clamping finger platform with a pear-shaped hole that has the function of improving the compaction of the wick. A groove is arranged horizontally at the bottom, that is, parallel to the direction of the wick fibers. Since the groove is at the bottom, the pressing finger is used to separate the wick at the top of the flyer coil. During the separation of the wick in the lower part there is also the risk of unraveling, since when the coil is lowered the wick is positioned in the opening area of the groove and exits through it.

To allow a safe separation of the fiber wick without risk of unraveling both the upper end and the lower end of the coil, it is necessary to change respectively the clamping finger with a clamping finger with the slot respectively located on the other side.

The most obvious state of the art is put into practice by means of EP 1 666 650 B1 since this is an attempt to solve the problem of threading. The memory reveals a clamping finger platform with a circular hole and a groove that flows tangentially with respect to the top of the hole. The groove forms a retaining wing with the circular hole which in its upper upper part has a lateral inclination, slightly protruding from the platform in the direction of the side opposite the flyer coil. With the inclination of the retention wing, the risk of threading can certainly be reduced, but the result is still not considered satisfactory enough. On the other hand, from the technical point of view of manufacturing the exact bending of the retention wing is complicated.

The objective of the present invention, therefore, is to provide a pressing finger that allows the wick to be separated both at the top and bottom of the flyer coil and that prevents separation by threading on the side. oriented towards the groove of the flyer coil safely and easily.

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The task is solved according to the invention by means of a pressing finger with the features of claim 1. Other advantageously perfected embodiments of the invention are the subject of the dependent claims.

To solve the task, the longitudinal expansion of the hole is greater than its transverse expansion and the distance between the mouth of the groove and the end of the longitudinal expansion oriented towards the arm of the clamping finger is in the direction of the major wick fibers. than half of the transverse dilatation.

Accordingly, the present invention is based on a certain shape of the hole and a particular arrangement of the groove. An orifice with a greater longitudinal expansion does not, by itself, offer any advantage as regards the risk of unraveling. The arrangement according to the invention of the slot is only possible by means of an elongated hole. In the case of a circular hole, the longitudinal expansion and the transversal expansion are identical. An arrangement of the groove so that the mouth opening area of the groove in the direction of the wick fibers is a distance from the end of the longitudinal expansion oriented towards the arm of the clamping finger greater than half of the transverse expansion, practically It is not possible with a circular hole. Thanks to the arrangement according to the invention, the retention wing, formed by the hole with the groove, can be clearly lengthened, thereby safely preventing threading. An inclination of the retention wing is not necessary. The manufacture of an elongated hole does not, in comparison with a circular hole, imply any additional cost.

The hole is advantageously configured as an elongated hole, the longitudinal expansion being limited by means of semicircles and the transversal expansion by means of longitudinal sides of parallel development. The long and straight longitudinal sides existing in an elongated hole also prevent threading. By forming the hole as an elongated hole, the groove flows into the hole in the area of the longitudinal sides. As a consequence, the distance between the mouth of the groove and the end of the longitudinal expansion oriented towards the arm of the pressing finger is in the longitudinal direction of the wick greater than half of the transverse expansion.

Alternatively, the hole may have the shape of an ellipse.

According to another alternative, the hole can be pear-shaped. In this case you can take advantage of the pear shape. As is known, the narrowest end points in the direction of the wick fibers.

Advantageously, the longitudinal expansion is at least 50% greater than the transversal expansion. That is, with a typical transverse expansion of 5 mm the hole should conveniently have a length of at least 7.5 mm. With these dimensions, the retention wing can be configured large enough, with sufficient space remaining for the groove opening area.

The angle that forms the groove with the direction of the wick fibers is between 20 ° and 30 °, the limits being closed. In this way the groove is optimally adapted to the arrangement of the assembly, facilitating threading and preventing threading.

The invention is explained in detail below in view of an embodiment shown in the drawings.

It is shown in:

Figure 1 a part of a cigarette lighter, the flyer coil presenting a wick reserve at its upper end;

Figure 2 a part of a cigarette lighter, the flyer coil presenting a wick reserve at its lower end;

Figure 3 a pressing finger according to the invention;

Figure 4 the hole and the groove of a pressing finger according to the state of the art;

Figure 5 the hole and groove of a pressing finger according to the invention;

Figure 6 the hole and the groove of another pressing finger according to the invention;

Figure 7 the hole and the groove of a third pressing finger according to the invention.

Figures 1 and 2 illustrate the main structure and operation of a cigarette lighter. The manuar tape is driven through a handle of which only the front cylinders 1 are shown in the figures. The pre-stretched wick 2 is introduced into the flyer wings 3 and is conducted through one of the wings to the lower end Of the same. On the wing there is a clamping finger 8. The wick 2 is wound around the arm of the clamp 6 and is driven through the hole 11 of the clamping finger platform 7. The flyer coil 4 is arranged in a bobbin carriage 9. The Bobbin carriage 9 can be moved up and down, the wick 2 acquires as a result of the rotation of the wings 3 and the foyer coil 4 the necessary torsion and is placed by means of the pressing finger 8 on the coil 4. To achieve the distribution of the wick 2 over the entire axial length of the coil 4, the coil 4 moves with the aid of the bobbin carriage 9 up and down.

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When the coil 4 has the desired diameter, a wick reserve 5a, 5b is created with a smaller twist. In the case of figure 1 the wick reserve 5a has been placed at the upper end of the coil. When the bobbin carriage 9 moves with the coil 4 upwards in the direction of the arrow 10a, the wick 2 is broken at the point of least twist, resulting in the desired separation. In the case of figure 2, the wick reserve 5b has been placed at the lower end of the flyer coil 4. To separate the wick, the bobbin carriage 9 must be lowered with the coil 4 in the direction of the arrow 10b .

Figure 3 shows a pressing finger 8 according to the invention. Only the end facing the pressing finger platform 7 is shown of the pressing finger arm 6. The pressing finger platform 7 has a groove 14 on the inlet side, in a known manner, and on the other side from hole 11 a funnel-shaped notch 13. After passing the wick 2 through the hole 11, the wick 2 is introduced, on the opposite side of the coil 4, into the groove 14 and, on the side facing the coil 4, in the funnel-shaped notch. This reduces the unwanted deviation of the wick 2 that occurs when passing through the hole 11. The presser finger platform has a curved edge respectively 17 and 18. respectively, this prevents the pressing finger from hitching when placing the wick in upper or lower inclination of the flyer coil 4. The direction of the fibers of the wick 2 through the hole 11 is indicated by the dashed line 16. According to the invention, the hole 11 has direction of the fibers of the wick a greater expansion than transversely with respect to said direction. The groove 12 for the introduction of the wick into the hole 11 flows obliquely into the hole 11. The angle that forms the groove 12 with the direction of the fibers 16 of the wick 2 is identified in Figures 5 and 6 with W. slot 12 and the elongated hole 11 are arranged so that a larger retaining wing 15 is produced against the prior art. The retaining wing 15 is between the slot 12 and the hole 11.

The configuration according to the invention of the slot 12 and the hole 11 is shown in greater detail in Figures 5 and 6. For a better understanding of the invention, Figure 4 shows a configuration of the slot 12a and the hole 11a according to the state of technique Figure 4 shows a circular hole 11a. The circle has a longitudinal expansion in the direction of the fibers 16a of the wick. The transverse expansion with respect to the direction of the wick fibers is defined with Qa. In the circular hole, the longitudinal expansion La and the transversal expansion Qa are logically equal. Due to the circular shape, the opening area 19a of the groove 12a begins relatively close to the end facing the arm of the clamping finger 6 of the longitudinal expansion La. The retention wing 15a formed by the groove 12a and the circular hole 11a is therefore relatively short, so that in case of a tensile request the wick 2a can slide next to the retention wing 15a and exit from slot 15a.

Figure 5 shows a hole 11b configured as an elongated hole. The longitudinal expansion Lb of the hole 11b, that is, the expansion in the direction of the fibers 16b of the wick 2b, is limited by the semicircles and the transverse expansion Qb by the parallel longitudinal sides. The radius of the semicircles corresponds exactly to half of the transverse dilation Qb, that is to Qb / 2.

According to the invention, the distance Ab from the mouth area 19b of the groove 12b with respect to the end of the longitudinal expansion Lb oriented towards the arm of the clamping finger must be greater than half of the transverse expansion Qb / 2. This means for the configuration as an elongated hole illustrated in Figure 5 that the mouth area 19b is in the area of the parallel longitudinal sides. The retaining wing 15b formed by the groove 12b and the elongated hole 11b is considerably larger compared to an arrangement such as that shown in Figure 4. Therefore, the wick 2b can no longer be unwound.

Figure 6 shows an alternative embodiment of the present invention. The hole 11c, in which the groove 12c ends, has an ellipse shape. Ellipse 11c has an expansion Lc in the direction of the fibers 16c of the wick and a transverse expansion Qc with respect to the direction of the fibers 16c. The distance Ac between the mouth area 19c of the groove 12c and the end of the longitudinal expansion Lc oriented towards the arm of the pressing finger is in the direction of the fibers 16c of the wick 2c greater than half of the transverse expansion Qc / 2 . Also in this case the retention wing 15c is larger compared to the prior art.

Figure 7 shows another alternative embodiment of the present invention, The hole 11d, into which the groove 12d ends, is pear-shaped. The pear-shaped hole 11d has a dilation Ld in the direction of the fibers 16d of the wick and a transverse Qd dilation relative to the direction of the fibers 16d. The distance Ad between the mouth area 19d of the groove 12d and the end of the longitudinal expansion Ld oriented towards the arm of the pressing finger is in the direction of the fibers 16d of the wick 2d greater than half of the transverse expansion Qd / 2 . Also in this case the retention wing 15d is larger compared to the prior art.

In the illustrated embodiments, the slot 12b, 12c, 12d strikes the hole 11b, 11c, 11d from above. In another alternative not shown, the groove can also impact the hole from below.

Claims (7)

5 10 fifteen twenty 25 30 35 1. Pressing finger (8) for a burner comprising a pressing finger arm (6) and a pressing finger platform (7) and which is configured for guiding a wick during the formation of a coil (4) in a burner, presenting the clamping finger platform (7) a hole (11, 11b, 11c, 11d) for the passage of a wick (2, 2b, 2c, 2d), which in the direction of the fibers (16, 16b, 16c , 16d) of the wick (2, 2b, 2c, 2d) through the hole (11, 11b, 11c) has a longitudinal expansion (Lb, Lc, Ld) and, transversely with respect to the direction of the fibers (16, 16b, 16c, 16d), a transverse expansion (Qb, Qc, Qd) of the wick (2, 2b, 2c, 2d), and a groove (12, 12b, 12c, 12d) that flows into the hole (11, 11b, 11c, 11d) for the introduction of a wick (2, 2b, 2c, 2d) into the hole (11, 11b, 11c, 11d) that forms with the direction of the fibers (16, 16b, 16c, 16d) of the wick (2, 2b, 2c) an angle (W) of less than 45 °, characterized in that the longitudinal expansion (Lb, L c, Ld) of the hole (11, 11b, 11c, 11d) is greater than the transverse expansion (Qb, Qc, Qd) and because the distance (Ab, Ac, Ad) between the mouth area (19b, 19c) of the groove (12, 12b, 12c, 12d) and the end of the longitudinal expansion (Lb, Lc, Ld) oriented towards the arm of the clamping finger (6) is in the direction of the fibers (16, 16b, 16c) of the wick (2, 2b, 2c) greater than half of the transverse dilatation (Qb / 2, Qc / 2, Qd / 2). 2. Pressing finger according to claim 1, characterized in that the hole (11b) is configured as an elongated hole, the longitudinal expansion (Lb) being limited by the semicircles and the transversal expansion (Qb) by the parallel longitudinal sides. 3. Pressing finger (8) according to claim 1, characterized in that the hole (11 c) has the shape of an ellipse. 4. Pressing finger (8) according to claim 1, characterized in that the hole (11 d) is pear-shaped. 5. Pressing finger (8) according to one of the preceding claims, characterized in that the longitudinal expansion (Lb, Lc, Ld) is at least 50% larger than the transverse expansion (Qb, Qc, Qd). 6. Pressing finger (8) according to one of the preceding claims, characterized in that the angle (W) formed by the groove (12, 12b, 12c, 12d) and the direction of the fibers (16, 16b, 16c, 16d) of the wick (2, 2b, 2c, 2d) is 30 ° or less. 7. Pressing finger (8) according to one of the preceding claims, characterized in that the angle (W) formed by the groove (12, 12b, 12c, 12d) and the direction of the fibers (16, 16b, 16c, 16d) of the wick (2, 2b, 2c, 2d) is 20 ° or more.