US1959138A

US1959138A - Presser foot

Info

Publication number: US1959138A
Application number: US513799A
Authority: US
Inventors: Erick A Nimmer
Original assignee: Chase Bag Co
Current assignee: Chase Bag Co
Priority date: 1931-02-06
Filing date: 1931-02-06
Publication date: 1934-05-15
Anticipated expiration: 1951-05-15

Description

E. A. NIMMER PRESSER FOOT May 15, 1934.

Filed Feb. 6, 1931 A TTORNEYS Patented May 15, 1934 UNITED STATES PATENT OFFICE Chase Bag 00., Milwaukee,

of Wisconsin Wis., a corporation Application February 6, 1931, Serial No. 513,799

1 Claim.

This invention relates in general to sewing machines and more particularly to a novel presser foot construction for use in such machines. While the invention will be described as adapted for embodiment in a bag sewing machine, it is to be understood that it is equally well adapted for use in various types of sewing machines.

In sewing bags such as burlap bags as well as bags of other material the edges to be sewn together are fed very rapidly through the stitch forming mechanism and there is serious danger of the sewer being injured by the needle of the stitch forming mechanism. Furthermore, the edges of the bags, especially of burlap bags or other bags of similar coarse material, tend to ravel and collect around or entangle with the presser foot in prior machines. This has the disadvantage of slowing up production.

One of the principal objects of the present invention is to provide a novel presser foot construction which adequately protects the sewer or operator against injury by the stitch forming mechanism and which precludes ravelings from collecting or wrapping around or entangling with the presser foot.

A further object is to provide. a presser foot construction having these advantages, and capacities, which is simple and durable in construction, reliable and safe in operation and easy and comparatively inexpensive to manufacture.

Other objects and advantages reside in certain novel features of the construction, arrangement and combination of parts which will be hereinafter more fully described and particularly pointed out in the appended claim, reference being had to the accompanying drawing forming a part of this specification, and in which Figure 1 is a perspective view showing a bag sewing machine equipped with a presser foot embodying the presentinvention;

Figure 2 is a view in end elevation of the machine shown in Figure 1, a portion of the presser foot being broken away and shown in section for the sake of illustration;

Figure 3 is a sectional of Figure 2;

Figure 4 is a plan view of the presser foot detached, parts being broken away and shown in section for'the sake of illustration; and

Figure 5 is a detail perspective view of the presser foot.

Referring to the drawing, and more particularly to Figure 1, the numeral ldesignates generally a bag sewing machine of conventional construction. The sewing machine has the usual view taken on line 3-3 needle 2 (see Figure 2) operated in the conventional manner and forming one of the principal elements of the stitch forming mechanism. The usual presser bar 3 is provided and has its lower end connected up with a presser foot 4 by means of a connector 5.

The presser foot 4 has a bottom plate 6 provided with a needle opening 7 and is formed with upwardly inclined front and rear end portions 9 and 10. Soldered, welded or otherwise connected to the bottom plate 6 and its upturned end portions 9 and 10 is a guard plate designated generally as 11, the guard plate 11 having a relatively high front portion 12 of transversely curved form, a relatively large tapered or substantially triangular side portion 13 and a relatively small side portion 14. The front portion 12 of the guard plate is positioned immediately in front of the needle in the assembly as will be understood from Figures 1 and 2 of the drawing and consequently affords adequate protection for the sewer or operator of the machine.

Integral with or suitably attached to the bottom plate is an upstanding lug 15 which is freely fitted in the slotted lower end of the connector 5. The upper end of the connector is formed with an axial opening 16 receiving the lower end of the presser bar 3 and fastened thereto by a set screw 17. The lug 15 of the presser foot is pivotally interconnected with the connector 5 by means of a pivot pin or pivot screw 18. The side portion 13 of the guard plate may have an opening 13' to afford access to the pivot pin 18, if desired. The lower slotted end of the connector 5 is so shaped and designed and is of such size as to permit limited rocking movement of the presser foot relative to the connector about the pin 18 as an axis.

Due to the structure and imperforate character of the guard or at least of its front portion and to its manner of organization with the presser foot it not only serves as a protection for the sewer or operator but also precludes the ravelings of the edges of the bag being sewn from entangling with or wrapping around the connector or lower part of the presser bar or with any of the elements of the presser foot. On the contrary, all such ravelings are constrained to pass under the presser foot and are carried along with the work as it is fed through the machine. In this way production is speeded up and the sewer or operator protected from injury.

The invention claimed is:

In a sewing machine having the usual stitch forming mechanism including a needle, a presser foot comprising a bottom plate provided with an opening to accommodate the needle and having an upturned forward end, and an imperforate guard plate having its lower edges connected to and continuous with the front and at least one of the side edges of the bottom plate and extendingvertically in the front of and also laterally III.