US3002477A

US3002477A - Sewing machine presser foot

Info

Publication number: US3002477A
Application number: US17931A
Authority: US
Inventors: Silberman David
Original assignee: PLACKET CLOSING CORP OF AMERIC
Current assignee: PLACKET CLOSING CORP OF AMERIC; PLACKET CLOSING Corp OF AMERICA
Priority date: 1960-03-28
Filing date: 1960-03-28
Publication date: 1961-10-03
Anticipated expiration: 1978-10-03

Description

Oct. 3, 1961 Filed March 28,- 1960 2 Sheets-Sheet 1 INVENTOR.

' DAVID SILBERMAN BY M a ATTORNEY Oct. 3, 1961 D. SILBERMAN 3,002,477

SEWING MACHINE PRESSER FOOT Filed March 28, 1960 2 Sheets-Sheet 2 INVENTOR. DAVID SILBERMAN AT Togugy States The present invention is directed to a sewing machine presser foot, and more particularly to a sewing machine presser foot having a pair of gauge bars which may be readily pivoted from a position in which the gauge bars are juxtaposed to the instep of the presser foot to a position in which the gauge bars are above the instep of the presser foot.

It is an object of this invention to provide a novel sewing machine presser foot.

-It is an object of this invention to provide a novel sewing machine presser foot adapted for sewing concealed slide fasteners.

It is another object of this invention to provide a novel sewing machine presser foot adapted for sewing concealed slide fasteners on a plurality of tapes without the necessity of turning the presser footor the slide fastener tapes around end-on-end when going from one slide fastener tape to another.

Other objects will appear hereinafter.

For the purpose of illustrating the invention there is shown in the drawings a form which is presently preferred; it 'being understood, however, that this invention is not limited to the precise arrangements and instrumentalities shown.

FIGURE 1 is a perspective view of applicants novel A presser foot. V

FIGURE 2 is anend view of applicants presser foot. FIGURE 3 is a partly cross-sectional view taken along lines 33 of FIGURE 2. g

FIGURE 4 is a cross-sectional view taken along lines 4--4 of FIGURE 1.

FIGURE 5 is a perspective view of applicants novel presser foot showing the manner in which it is to be used. I r

FIGURE 6 is a front view of applicants novel presser foot showing the manner in which it is to be used-.-

FIGURE7 is a front view of applicants novel presser foot showing the manner in which it is to be used.

Referring now to the drawing in detail, where. like numerals indicate like elements, there is shown in FIG- URE 1 a perspective view of applicants novel sewing machine presser foot.

The applicants presser foot is designated by the numeral 10. The presser foot includes an upstanding body portion 12 having an angled arm 14. Attached to the free end of the arm 14 and perpendicular to the body portion 12, there is provided a foot 16 having a rounded toe 18. The foot 16 is provided with a plurality of aligned needle holes. The needle hole 20 is axially disposed intermediate the side portions of the foot 16. The needle holes 22 and 24 are in the form of notches on the side portions of the foot 16. It will be noticed that aten the needle holes 20, 22, and 24 form a straight line perpendicular to the axis of the foot 16.

, A cylinder 26 having an axial bore 28 is mounted on the angle arm 14 in any convenient manner such as soldering. It will be noted that the length of the cylinder 26 corresponds to the Width of foot 16 and the base of body portion 12 (see FIGURE 4). A pin 34 having threaded ends 36 and 38 extends through the bore 28. It will be noticed that the outer diameter of pin 34 is slightly smaller than the diameter of bore 28. A pair of

gauge bars

40 and 42 are provided, with gauge bar 40 being mounted on pin 34 on one side of the bodyp'ortion 12 Patented Oct. 3, 1961- and gauge bar 42 being mounted on pin 34 on the other ing the pin 34. A plurality of nuts are threaded onto the

threaded ends

36 and 38 of pin 34 so as to maintain the elements in assembled relation.

Since the

gauge bars

40 and 42 are provided withv a hole 41 which is of larger diameter than the pin 34,

the

gauge bars

40 and 42 may be pivoted in a plane parallel to the axis of the foot 16 to the position shown in phantom in FIGURE 2. The provision of a resilient means such as

springs

52 and 54 enable the

gauge bars

40 and 42 to be moved closer to the instep or side portion of the foot 16.

It will be noted that the inner surface ofeachgauge bar is tapered as shown at 45 on gauge bar 40 and at 47 on gauge bar 42. When the

gauge bars

40 and 42 are in their lowermost position (see FIGURES 3 and 6), the gauge bars are in planes which are parallel to the planes of the insteps of the foot 16. It will be noted that the

tapered portions

45 and 47 are the closest portions to the insteps. At the ends of cylinder 26 on the upper peripheral surface thereof,

shoulders

30 and 32 are provided. Shoulder 32 cooperates with inturned flange 48 on gauge bar 40 to limit the pivoting movement of gauge bar 40. Shoulder 30 cooperates with inturned flange 50 on gauge bar 42 to limit the pivoting of gauge bar 42. It will be noted that the innermost end of inturned flange 48, for example, is spaced from surface 49 on cylinder 26 so that gauge bar 40 may be moved toward and away from foot 16. v

The body portion 12 tapers upwardly and is provided with an offset arm 56.

to be moved in a direction perpendicular to the sewing machine support 60 is conventional and need not be described in detail.

As shown in FIGURES 5, 6, and 7, the applicants novel presser foot is particularly adapted for sewing concealed slide fastener tapes to a fabric so that the slide fastener tape is concealed by the fabric and gives the impression of a sewn seam. The use of concealed slide fastener tapes has become increasingly popular in the textile industry. In order to have a concealed slide fastener tape, the line of stitching between the slide fastener tape and the adjacent fabric must be as close to the slide fastener elements 72 as possible. As the slide fastener tape 70 is sewed to the fabric 68 and moved along during the sewing process, the free end of the tape 70 flaps in the breeze caused by movement of the material. The flapping of the free end of tape 70 interferes with the operator of the sewing machine and pervents the sewing of a straight seam on a mass production basis. To eliminate this problem, a pair of

needles

74 and 76 are utilized. Needle 74 cooperates with needle hole 22 to sew the slide fastener tape to the fabric 68 as close as possible to the line of slide fastener elements 72. Needle 76 cooperates with needle hole 20 to sew the slide fastener tape 70 to the fabric 68. As is well known in the art, the slide fastener tape is sewn to an inner ply of a fabric so that Mounted on the offset arm 56; is a conventional structure including slide 58 and thumb- It will be noted that the shank per-- the seams are not visible. Thus, it is to be expressly understood that fabric 68 represents the inner ply so that the seams sewn by

needles

74 and 76 will be concealed.

' The applicants presser foot is utilized in the following manner;

The inner ply of a fabric 68 is placed on the needle plate 66 with one edge of the fabric being directly in line and underneath one instep of the foot 16. As shown in FIGURE 6, the gauge bar 42 is pivoted upwardly by grasping the tab 46 and pivoting the gauge bar 42 about pin 34. A slide fastener tape 70 is placed between the presser foot and the fabric 68 with the slide fastener ele ments engaged with the instep of the foot 16. The gauge bar 42 is pivoted downwardly so that the slide fastener elements 72 are between the tapered portion 47 of the gauge bar 42 and the instep of foot 16. Sinceneedle 74 cooperates with hole 22 at the instep of foot 16', the seam holding the tape 70 to the fabric 68 will be as close tothe slide fastener elements 72 as possible. While needle 74 is sewing a seam adjacent to the fastener elements 72, needle 76 will be sewing a seam which is located intermediate the fastener elements 72 and the free edge of the tape 70. It will be noted that while the needle 74 is sewing a seam along the fastener elements 72, the fastener elements are maintained in an upright position between the tapered portion 47 on the gauge bar 42 and the instep of the foot 16.

As the

needles

74 and 76 are sewing a seam, the tape 70 and fabric 68 are moved longitudinally away from the presser foot. When the entire tape has been traversed, it is not necessary to turn the presser foot or the tapes endon-end before sewing the tape 78 to the fabric 68.

In order to secure the tape 78 to an inner ply of the fabric 68, it is only necessary to move the presser foot in a direction perpendicular to the sewing machine support 60 as shown in FIGURE 7. When the slide 58 has been moved to a position where the shank of the thumbscrew 62 is at one extremity of the slot 64, the instep of the foot 16 will be directly above the leading edge of the inner ply of fabric 68. Gauge bar 40 is pivoted about pin 34 by raising the tab 44. The tape 78 is positioned between the sole of foot 16 and the inner ply of the fabric 68 with the fastener elements 72 in an upright position'parallel to the instep of the foot 16. The gauge bar 40 is then lowered and sewing of fastener tape 78 to the inner ply of fabric 68 may then be commenced.

It will be noted that needle 76 is now cooperating with needle hole 24 to sew a stitch as closely as possible to the fastener elements 72. Needle 74 is now cooperating with needle hole to sew a stitch which is intermediate the fastener elements 72 and the free edge of the tape 78.

As the sewing commences, the tape 78 and fabric 68 move in the opposite direction until the entire length of tape 78 has been traversed.

Since the gauge bars 40 and 42 can be moved closer to the foot 16, it will be noted that different size fastener elements may be employed on the fastener tapes. Thus, the applicants'presser foot is versatile in the range of fastener elements which can be accommodated.

When the fabric 68 is utilized in a garment the

mating leading edges

80 and 82 will cooperate to conceal the slide fastener. Since the tapes and 78 are sewed to an inner ply of the fabric 68, they will not be visible and the mating of leading edges and 82 will give the impression of a sewn seam.

The present invention may be embodied in other specific forms without departing from the spirit or essential attributes thereof and, accordingly, reference should be made to the appended claims, rather than to the foregoing specification as indicating the scope of the invention.

I claim:

1. A sewing machine presser foot comprising a body portion, a foot connected to said body portion, a cylinder connected to said body portion above said foot, a bore in said cylinder, a pin extending through said bore, a pair of gauge bars, each gauge bar being spaced from the foot and pivotably secured to said pin, a flange on each gauge bar extending toward the foot, a shoulder on each end of the cylinder cooperating with each of the flanges for limiting the pivoting movement of said gauge bars, tabs on each gauge bar extending in a direction away from the foot, and a plurality of aligned holes in said foot.

2. The structure as set forth in claim 1 wherein said plurality of aligned holes includes a hole in said foot intermediate the insteps thereof, a notch on one instep, and a notch on the other instep, the axes of said notches and said hole being in a line perpendicular to the axis of said foot.

3. The structure as set forth in claim 1 including a spring surrounding the pin on each side of the cylinder, each spring extending between one face of the cylinder and the adjacent gauge bar.

References Cited in the file of this patent UNITED STATES PATENTS 488,073 Iversen Dec. 13, 1892 1,918,643 Heck July 18, 1933 1,943,203 Chudner Jan. 9, 1934 2,671,422 Tamburro Mar. 9, 1954 FOREIGN PATENTS 168,486 Austria June 11, 1951