US3433192A - Presser foot assemblage - Google Patents

Description

Mamh 8. 1969 D. c. PINGITORE ET AL 3,433,192

PRESSER FOOT ASSEMBLAGE Filed June 12, 1967 0 SR mm T u WGNC vw MmR 5M KOM ao mm 0 D m ua 5 5 a I 7 l .1 ZJ 4 '1 2 4 Qwm ATTORNEY United States Patent 3,433,192 PRESSER FOOT ASSEMBLAGE Domenick C. Pingitore, 129 Monmouth St.; Angelo Spagnuolo, 2 Wall St.; and John N. Ricci, 22 De Forest Ave., all of Red Bank, NJ. 07701 Filed June 12, 1967, Ser. No. 645,266 US. Cl. 112235 Int. Cl. Db 29/00, 29/10 7 Claims ABSTRACT OF THE DISCLOSURE Background of the invention The invention deals with an assemblage of the character defined, wherein the structure of the rollers not only provides the desirable feed of materials of various types and kinds, but also expedites the formation of curved stitchings in the materials and said curved toe portion also provides on the foot a stitch guide.

While assemblages of the kind under consideration are well-known in the art, United States patents which appear to have the closest bearing on the present novel structure are as follows: Haines, Pat. No. 2,669,956, Feb. 23, 1954; Schrader, Pat. No. 2,907,291, Oct. 6, 1959; and Winberg, Pat. No. 2,955,553, Oct. 11, 1960. To applicants knowledge, the assemblage herein defined appears to be distinctly new in the :art.

Summary of the invention With devices of the type and kind under consideration, a very simple and economical presser foot structure is provided, which alone, and/or with the channel member forming the assemblage, can be produced for a nominal selling price. In uses of the presser foot on very thin and slippery fabrics or materials, the use of the needle guide and material stripper element at the needle station of the presser foot substantially improves stitching operations upon materials of this type and kind.

The novel features of the invention will be best understood from the following description, when taken together with the accompanying drawing, in which certain embodiments of the invention are disclosed and, in which, the separate parts are designated by suitable reference characters in each of the views and, in which:

FIG. 1 is a side view on an enlarged scale of a presser foot assemblage illustrating the parts in a normal operative position as they would appear in a sewing machine.

FIG. 2 is a rear view of the assemblage, with parts of the construction broken away and in section.

FIG. 3 is a bottom plan view of the structure, omitting part of the background showing.

FIG. 4 is a view, similar to FIG. 1, but viewed from the opposed side of the assemblage and illustrating a modification.

FIG. 5 is a partial top plan view of the structure seen in FIG. 4; and

FIG. 6 is a section on the line 6-6 of FIG. 4.

3,433,192 Patented Mar. 18, 1969 In FIGS. 1 to 3, the assemblage comprises a foot supporting channel member 10 pivoted, as seen at 11, to a presser foot 12, comprising a generally rectangular casing 13. The casing 13 is defined by side walls 14, 15 joined by front and rear walls 16, 17 and an intermediate wall 18 defining a needle station. The wall 18 is apertured at 19 for clearance of the needle of a sewing machine. Mounted in the walls 15, 16 are pin axes 20 for front and rear rollers 21, 22, preferably of plastic material, such as nylon. The axes 20 are, in the construction shown, screws having lefthand threads in the wall 14. This structural arrangement facilitates replacement of the rollers 21 and 22 from time to time. In the present showing, the rollers 21, 22 are formed by two outer rollers 21', 22 and intermediate rollers 21", 22". The roller 21" is grooved, as seen at 23, FIG. 3, for needle clearance. The wall 16 has, at one side, an upwardly curved toe part 24, providing a stitch guide, as at 25.

The casing 13 has a raised top wall 26 forming a chamber for the roller 22, the roller 21 operating between walls 16 and 18. On the wall 26 are raised hearing strips 27, note FIG. 2, forming supports for the pivot pin 11, as clearly seen in FIG. 1. The roller end of the member 10 fits between the strips 27 and includes a socket 28 for a coil spring 29 seating in a recess 30 in the wall 26, note FIG. 2.

The assemblage in FIGS. 1 to 3 is primarily for use with laminated or piled fabrics, the rollers 21, 22 projecting well below the lower surfaces of the casing 13. In FIGS. 4 and 6 is shown a modified assemblage adapted for use on thin materials where the feed of the material is found diflicult, if not impossible. This assemblage comprises a member 31 and a presser foot 32, generally similar to 10 and 12, respectively. The pivot of 31 on 32 is seen at 33. A spring, similar to the spring 29, will be employed, but no attempt has been made to show the latter to simplify the illustration. The casing 34 differs from 13 primarily in the structure of the Wall 18 and, in FIG. 6, the wall of 34 is shown in section at 35 in defining the needle station. Centrally of 35 is an aperture 36, in which is slidably mounted a material stripper :and needle guide element or tube 37, also preferably of plastic material. On 37 is a flange 38 seating on the wall 35, thus limiting downward movement of 37 and a reduced end 39 is arranged in an aperture of a spring plate 40. The plate 40 is fixed to one side wall of the casing 34 by a screw 41, partially threaded in the wall 35, :as seen in FIG. 6. It will appear, from FIGS. 4 and 6, that the lower end of the tube 37 is normally below the surface of the rollers 42 and 43, generally similar to the rollers 21 and 22. However, the grooving of the forward roller 42 or the intermediate part thereof for needle clearance is not essential. The forward end of the casing 34 has a toe portion 44, similar to 24 in FIGS. 1 to 3.

In FIGS. 4 to 6, the rollers 42, 43 are smaller in diameter than the rollers 21, 22 in dealing with relatively thin materials. With some forms of materials, the needle will have a tendency to draw the material upwardly between the rollers. This is checked by the pressure or element 37 which will strip the material from the needle in each stroke thereof. In this action, the tube 37 will be raised against the action of the spring plate 40, which immediately depresses the material for the next successive stitching operation.

With both forms of construction shown, the rollers, as at 21, 22, 42, 43 will maintain the desirable lay of the material adjacent the needle station of the foot and, by providing the arrangement of three rollers in each roller assemblage, what may be defined as a difierential action is provided varying the speed of rotation of the outer rollers, particularly in the curved or rounded stitching operations on the materials as passed beneath the foot of the assemblage.

Having fully described our invention, what We claim as new and desire to secure by Letters Patent is:

1. A presser foot assemblage comprising a support channel member, a presser foot, a pivot coupling said member and foot, the foot comprising a casing having side, front and rear walls and an intermediate wall defining a needle station, spaced axis means mounted in said side walls at each side of said station, front and rear rollers mounted on said means and arranged between said front and intermediate walls and said rear and intermediate walls respectively, said front wall of the casing having an upwardly curved toe part, the rear of the casing having a top wall portion, and a spring arranged between said member and the top wall portion of said casing.

2. An assemblage as defined in claim 1, wherein said axis means comprises screws threaded into one side wall of the casing.

3. An assemblage as defined in claim 2, wherein said screws have left-hand threads.

4. An assemblage as defined in claim 1, wherein each roller is defined by two outer rollers and an intermediate roller.

5. An assemblage as defined in claim 4, wherein one of said intermediate rollers is grooved.

6. An assemblage as defined in claim 1, wherein the wall of said needle station supports a vertically movable needle guide element, tensional means for supporting said 4 element in depressed position, and the lower end of said element being normally positioned below the surfaces of said rollers.

7. In an assemblage of the character defined, a presser foot comprising a casing having joined spaced side walls, front and rear rollers mounted in said casing between said side walls, said rollers having pin-like axes mounted in the side walls, the casing having, between said rollers, a transverse wall defining a needle station, the forward end of the casing having an upwardly curved toe part, the upper rear portion of the casing having bearing means for pivotal support of a channel member therewith, means provided at said station for yieldable support of a material stripper and needle guide element, and each of said rollers being defined by two outer rollers and an intermediate roller.

References Cited UNITED STATES PATENTS 1908 Great Britain. 8/ 1911 France.

PATRICK D. LAWSON, Primary Examiner.

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