CA1075535A - Presser foot for a concealed slide fastener - Google Patents

Presser foot for a concealed slide fastener

Info

Publication number
CA1075535A
CA1075535A CA293,490A CA293490A CA1075535A CA 1075535 A CA1075535 A CA 1075535A CA 293490 A CA293490 A CA 293490A CA 1075535 A CA1075535 A CA 1075535A
Authority
CA
Canada
Prior art keywords
support
sole
sole plate
index position
stem
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CA293,490A
Other languages
French (fr)
Inventor
Hisashi Doori
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
YKK Corp
Original Assignee
Yoshida Kogyo KK
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Yoshida Kogyo KK filed Critical Yoshida Kogyo KK
Application granted granted Critical
Publication of CA1075535A publication Critical patent/CA1075535A/en
Expired legal-status Critical Current

Links

Classifications

    • DTEXTILES; PAPER
    • D05SEWING; EMBROIDERING; TUFTING
    • D05BSEWING
    • D05B29/00Pressers; Presser feet
    • D05B29/06Presser feet
    • DTEXTILES; PAPER
    • D05SEWING; EMBROIDERING; TUFTING
    • D05BSEWING
    • D05B3/00Sewing apparatus or machines with mechanism for lateral movement of the needle or the work or both for making ornamental pattern seams, for sewing buttonholes, for reinforcing openings, or for fastening articles, e.g. buttons, by sewing
    • D05B3/12Sewing apparatus or machines with mechanism for lateral movement of the needle or the work or both for making ornamental pattern seams, for sewing buttonholes, for reinforcing openings, or for fastening articles, e.g. buttons, by sewing for fastening articles by sewing
    • D05B3/18Sewing apparatus or machines with mechanism for lateral movement of the needle or the work or both for making ornamental pattern seams, for sewing buttonholes, for reinforcing openings, or for fastening articles, e.g. buttons, by sewing for fastening articles by sewing hooks or eyelets
    • DTEXTILES; PAPER
    • D05SEWING; EMBROIDERING; TUFTING
    • D05DINDEXING SCHEME ASSOCIATED WITH SUBCLASSES D05B AND D05C, RELATING TO SEWING, EMBROIDERING AND TUFTING
    • D05D2203/00Selection of machines, accessories or parts of the same kind

Landscapes

  • Engineering & Computer Science (AREA)
  • Textile Engineering (AREA)
  • Sewing Machines And Sewing (AREA)

Abstract

ABSTRACT OF THE DISCLOSURE
A presser foot for a concealed slide fastener has a first sole plate having in its first sole a pair of spaced grooves each receptive of one of the rows of element of the slide fastener, a second sole plate having a second needle hole at one side thereof and a second sole which is at an angle to the first sole, and a bell crank supporting on its arms the first and second sole plates and pivotally mounted on a stem which can be attached to the presser bar of a sewing machine. The bell crank is pivotable between and lockable in a first position in which the first sole is substantially at a right angle to the stem and a second posi-tion in which the second sole is substantially at a right angle to the stem.

Description

The present invention relates to a presser foot for sewing a concealed slide fastener to a garment.
One known type of sewing machines for concealed slide fasteners includes a presser foot that can be used for sewing the fastener to the main fabric of a garment and also for sewing the backing to the fastener or sewing seams. The pres-ser foot includes a sole plate having a central needle hole located between a pair of guide grooves provided in its sole -and a pair of side needle holes located at the sides of the sole plate.
When sewing the fastener to the main fabric, the sewing needle is aligned with and moves up and down through the cen-tral needle hole with one of the rows of the fastener elements being received in one of the guide grooves. For sewing the backing to the fastener or sewing seams with the presser foot, the sole plate is displaced sideways`to bring one of the side needle holes into alignment with the sewing needle. With this displacement, however, one of the feed dogs of the sewing ~ -machine gets ~ust below one of the guide grooves and, while being operated, is unable to press the fabric pieces positive-ly against the sole of the sole plate. Accordingly, with the prior presser foot, the fabric pieces cannot be fed smoothly under the presser foot so that the fabric pieces are sewn by sti~ches at irregular intervals and the stitched fabric pieces are liable to get puckered or wavy.
An object of the present invention iS to provide a presser foot for a concealed slide fastener which can facili-tate sequential steps of sewing seams in a garment, sewing the backing of the garment to the slide fastener, and sewing the slide fastener to the main fabric.

~ .

-` 11)75535 ~nother ob~ect of the present invention ~ 8 to provide a presser foot which allows fabric p~eces to be fed smoothly and accurately for sew~ng them with st~tcheQ at a regular ~nterval and without being wrinkled.
According to the invention, there is provided a presser foot for a sewing machine having a needle movable along a predetermined path and usable in performing sewing operations upon a slide fastener having a pair of rows of fastener elements each secured with respect to a corresponding stringer tape, which presser foot comprises a stem connectable to the sewing machine; a support means including a first support arm and a second support arm integrally joined together and extending along respec-tive direction lines oriented generally at a right angle to each other. The support arms are pivotally connected at their joint to the stem for support thereby. The support ~ arms are pivotally movable together in a plane generally - parallel to the stem between a first index position in which the direction line of only the first support arm extends parallel to the predetermined path, and a second index position in which the direction line of only the second support arm extends parallel to the predetermined.
A first sole plate connected to the first support arm for -support thereby and has a pair of spaced grooves each for receiving a row of fastener elements in guided engagement therewith. The first sole plate has a needle hole located between the grooves to accommodate passage therethrough of the needle, when the support means is in the first index position, to establish a first line of stitching through the corresponding stringer tape. A second sole plate is connected to the second support arm for support thereby. The second sole plate has a surface disposed 10~7553S

for guided engagement with one of the rows of fastener elements, when the support means is in the second index position. The second sole plate has a needle hole to accommodate the passage therethrough of the needle, when the support means is in the second index position, to establish a second line of stitching through the corres-ponding stringer tape. The first and second sole palte are constrained by the first and second support arms for pivotal movement in unison therewith.
The above and other ob~ects and advan~ages of the pre-sent invention will become apparent from the following descrip-tion when taken in con~unction with the accompanying drawings.
Fig. 1 is a perspective view of a presser foot provided in accordance with the present invention;
Fig. 2 is a side elevational view with parts cut away of the presser foot;
Fig. 3 is an enlarged front elevational view of the presser foot with one of its sole plates put to use for sewing the backing fabric of a garment to a slide fastener stringer tape;
Fig~ 4 is an enlarged front elevational view of the presser foot with the other sole plate used for sewing the stringer tape to the main fabric of the garment;
Fig. 5 is a plan view of the back of a one-piece dress to which a concealed slide fastener is attached;
Fig. 6 is an enlarged cross-sectional view taken along line VI-VI of Fig. 5; and Fig. 7 is an enlarged cross-sectional view taken along line VII-VII of Fig. 5.
As shown in Figs. 1 and 2, a presser foot 10 comprises .

a stem ll fixed at its upper end to a presser bar (not shown) extending downwardly from a sewing machine head, a bell crank 12 pivotally supported on the lower end of the stem ll, and first and second sole plates 13,14 supported respectively on the free ends of a pair of arms 15,16 of the bell crank 12.
~he first sole plate 13 has in its first ~ole 17 a pair of spaced guide grooves 18,19 extending all the way along the length of the sole plate 13. Between the guide grooves 18,19, there is a partition 20 projecting downwardly and hav-ing its distal edge terminating ~ust short of the sole 17.
The guide grooves 18,19 d~verge away from each other from the sole 17 toward the top surface of the sole plate 13. The first 801e plate 13 has therein a first needle hole 21 for the passage therethrough of a sewing needle 22 (Fig. 3). The first needle hole 21 is located forwardly of the arm 15 of ~ - 4 -- the bell crank 12 and extends through the partition 20 and centrally between the guide grooves 18,19.
The second needle plate 14 has therein a second needle hole 23 located at one of the sides thereof. The second needle :~
hole 23 is substantially semicircular in cross section through-out its entire length so that it opens at the side of the sole plate 14. The second sole plate 14 has a second sole 24 which is substantially at a right angle to the first sole 17 of the first sole plate 13. The second needle hole 23 is located : 10 forwardly of the arm 16 of the bell crank 12 and is held in alignment with the first needle hole 21 in the first sole plate 13 in a direction perpendicular to the length of the first and second sole plates 13,14.
The bell crank 12 is mounted on the stem 11 by means of a pin 25 extending therethrough at a point where the arms 15,16 join together. The bell crank 12 is pivotable about the pin 25 between a first position (Fig. 4~ in which the first sole 13 is substantially at a right angle to the stem 11, or is parallel to a throat plate 26 of the sewing machine - 20 with the sewing needle 22 aligned with the first needle hole 21 and a second position (Fig. 3) in which the second sole : 23 is substantially at a right angle to the stem 11, or is parallel to the throat plate 26 with the sewing needle 22 aligned with the second needle hole 23. : -The throat plate 26 has therein a third needle hole 27 which is held in vertical alignment with the sewing needle 22, and which becomes registered with the first needle hole 21 when the first sole plate 13 is in the position of .

Fig. 4 and with the second needle hole 23 when the second sole plate 14 is in the position of Fig. 3. Although not shown, a pair of feed dogs are provided in the throat plate 26 one on each side of the third needle hole 27, the feed dogs facing the sole 17 at positions just outside the guide grooves 18,19 when the sole plate 13 is held in the position of Fig. 4. When the second sole plate 14 is in the position of Fig. 3, one of the feed dogs faces the sole 24.
A distance between the first sole 17 and the pin 25 is substantially the same as a distance between the second sole 24 and the pin 25.
The stem 11 has a spring-loaded ball 28 (Fig. 2) bias-ed toward the bell crank 12, and the bell crank 12 has a pair of semispherical recesses 29,30 (Figs. 3 and 4) each receptive of the ball 28. The recesses 29,30 are angularly spaced 90 degrees apart from each other and are disposed in the arms 15,16, respectively. Thus the bell crank 12 is lockable in the first position when the ball 28 is received in the recess 29 and in the second position when the ball 28 is received in the recess 30.
When making the back 31 of a one-piece dress 32 with a concealed slide fastener 33 as shown in Fig. 5, it,is customary to sew a seam 34 between the two main fabric pieces 35,35 of the back 31 leaving a fastener opening, to sew back-ing fabric pieces 36,36 ~Fig. 6) to the stringer tapes 37,37 of the slide fastener 33, and then to sew the stringer tapes 37,37 to the fabric pieces 35,35 of the back 31.
To sew the backing fabric piece 36 to the stringer 107553~

tape 37, the bell crank 12 is pivoted to lower the second sole plate 14 down to the position of Fig. 3, and the backing piece 36 and the stringer tape 37 are placed, one on the other, between the sole plate 14 and the throat plate 26 for stitching by the sewing needle 22. At this time, one of the feed dogs in the throat plate 26 presses the fabric pieces positively against the sole 24 of the sole plate 14.
Then, the bell crank 12 is pivoted back to bring the first sole plate 13 to its lowered position as illustrated in Fig. 4. The main fabric piece 35 of the back 31 is put on the throat plate 26 and the stringer tape 37 is placed on the fabric piece 35 with its row of elements 38 received in the guide groove 19. As the fabric piece 35 and the stringer tape 37 are moved forward by the feed dog, they are sewn to-gether by the sewing needle 22.
Although a preferred embodiment of the invention has -been shown and described in detail, it will be understood that various modifications or changes may be made without departing from the scope of the appended claims.

, ~
.

Claims (2)

The embodiments of the invention in which an exclusive property or privilege is claimed are defined as follows:
1. A presser foot for a sewing machine having a needle movable along a predetermined path and usable in performing sewing operations upon a slide fastener having a pair of rows of fastener elements each secured with respect to a corresponding stringer tape, which presser foot comprises a stem connectable to the sewing machine;
a support means including a first support arm and a second support arm integrally joined together and extending along respective direction lines oriented generally at a right angle to each other, said support arms being pivotally connected at their joint to said stem for support thereby, said support arms being pivotally movable together in a plane generally parallel to the stem between a first index position in which the direction line of only said first support arm extends parallel to said predetermined path, and a second index position in which the direction line of only said second support arm extends parallel to said predetermined path; a first sole plate connected to said first support arm for support thereby and having a pair of spaced grooves each for receiving a row of fastener elements in guided engagement therewith, said first sole plate having a needle hole located between said grooves to accommodate passage therethrough of said needle, when the support means is in said first index position, to establish a first line of stiching through the corresponding stringer tape; and a second sole plate connected to said second support arm for support thereby, said second sole plate having a surface disposed for guided engagement with one of said rows of fastener ele-ments, when the support means is in said second index position, said second sole plate having a needle hole to accommodate the passage therethrough of said needle, when the support means is in said second index position, to establish a second line of stitching through the corres-ponding stringer tape, said first and second sole plate being constrained by said first and second support arms for pivotal movement in unison therewith.
2. A presser foot according to claim 1 said stem having a spring-loaded ball, said first and second arms having first and second recesses, respectively, each receptive of said spring-loaded ball, and said support means being lockable in said first index position when said ball is received in said first recess and in said second index position when said ball is received in said second recess.
CA293,490A 1976-12-21 1977-12-20 Presser foot for a concealed slide fastener Expired CA1075535A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP17165676U JPS5388358U (en) 1976-12-21 1976-12-21

Publications (1)

Publication Number Publication Date
CA1075535A true CA1075535A (en) 1980-04-15

Family

ID=15927251

Family Applications (1)

Application Number Title Priority Date Filing Date
CA293,490A Expired CA1075535A (en) 1976-12-21 1977-12-20 Presser foot for a concealed slide fastener

Country Status (7)

Country Link
JP (1) JPS5388358U (en)
BE (1) BE862121A (en)
CA (1) CA1075535A (en)
DE (1) DE2756519A1 (en)
FR (1) FR2375373A1 (en)
GB (1) GB1559062A (en)
NL (1) NL7714096A (en)

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3349736A (en) * 1965-10-22 1967-10-31 Robert B Howell Zipper foot attachments
JPS5121765B2 (en) * 1973-05-19 1976-07-05

Also Published As

Publication number Publication date
GB1559062A (en) 1980-01-16
DE2756519A1 (en) 1978-06-22
NL7714096A (en) 1978-06-23
FR2375373A1 (en) 1978-07-21
BE862121A (en) 1978-04-14
JPS5388358U (en) 1978-07-20
FR2375373B1 (en) 1982-01-22

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