US1286452A - Combined trimming mechanism and presser-foot. - Google Patents

Description

W. F. TOSNEY.

COMBINED TRIMMING MECHANISM AND PRESSER FOOT.

APPLICATION FILED JAN. 17. 1917.

Patented Bee 3', 1918.

2 SHEETS-SHEET l.

W. F. TOSNEY.

COMBINED TRIMMING MECHANISM AND PRESSER FODT.

APPLICATION FILED mm. 12. um.

1,286,452. I Patented Dec. 3, R918 2 SHEETSSHEET 2.

awuwm coz UNITED STATES! Parents QFFICE,

WILLIAM F. TOSNEY, PHILADEL?HIA, PENNSYLVANIA, ASSIGNOR TO UNION l SPECIAL MACHINE COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

COMBENED TRIMMING MECHANISM AND EBESSER-BOOI.

S ecification of Letters Patent.

I rates-ices Dec, 3, ices.

To all whom it may concern:

Be it known that 1, WILLIAM F. TosNnY, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia,

State of Pennsylvania, have invented certain new and useful Improvements in Combined Trimming Mechanismand Presser-Feet, of which the following is a description, referones being bad to the accompanying drawing and to the figures of reference marked thereon.

abutted edges of fabric sections which are to be united by stitching to form a flat seam.

Prior to my invention, a prcsser foot of the above character has been constructed wherein the foot portion is formed of a main section and an auxiliary section, one of which is yieldingly mounted relative to the other so as to properly hold and guide two fabric sections, one of which is thicker than the other. Such presser foot has also been provided with a slot located between the sections and leading from the front end of the presser foot to a point adjacent the needle opening so that the fabric sections may have their edge portions turned up and trimmed preparatory to the uniting of the same.

An object of my invention is to provide a foot of the above character with means carried by the main section of the foot for supporting the up-turned portions of the fabric sections at each side thereof so as to prevent the same from curling or turning back, thus forming a ridge or rib instead of a fiat seam.

In the drawings, which show by way of illustration one embodiment of the invention Figure 1 is a side view showing the end of a work support, the needle bar, the needles carried thereby, and the improved presser foot in side elevation;

2 is a top plan view of the parts shown in Fig. l, the needle bar being omitted;

Fig. 3 is a view, partly in section and partly in side elevation, showing my improved presser foot; V

Fig. i is a bottom plan view of the same;

Fig. 5 is a sectional'view on the lime-51 auxiliary section.

of Fig. and

Fig. 6 is a view showing, more or less diagrammatically, two fabric sections, one of which is thicker than the other, united by stitching.

My improved prcsser foot is constructed for holding and guiding two fabric sections which are to have their edges abetted and united by stitching so as to. form a flat seam. The edge portions of the fabric sections are turned up and are led through a slot formed in the presser foot, and extending from the front end of the presser foot substantially in the line of feed to a point ad jacent the needle opening "in the presser foot. These upturned edge portions are trimmed, after which they are brought back into the plane of the fabric sections and united by suitable stitching mechanism. The presscr foot has a main section and an The slot is located in the main section and wholly between. the side edges thereof so that there is a portion of the main section extending along each side of the up-turned edge portions of the fabric sections. The auxiliary section is yieldingly supported relative to the main section and is adapted to clamp and hold a fabric section of a single thickness, while a fabric section, for example, of double thickness is clamped and held by the main section of the presser foot. v Referring more in detail to the drawings:

The improved presser foot' is shown as applied to asciving machine having a work support 1 and a: needle bar 2 carrying two pairs of needles 33 and k -i. The prcsser foot, as indicated at 5 in the drawings, is mounted on a prcsser bar 6 and has a rearwardly extending arm 7 which is secured to a guide bar 8. Said prcsscr foot is formed. with a main. section 9 which is rigidly attached to the shank 10 of the presser foot. This main section has, as herein shown, two

2, the work support being omitted;

needle openings ll and 12. The. needle opening 11 adapted to receive the front ,air of needles #5, while the needle opening 12 receives the rear pair of needles The main section of the presser foot is formed with a' slot 13. This slot 18 parallel b main shank and extending into said slot limits the 'up 20 from the front end of the foot a point adrecess formed in the main shank of the" presser foot therefor by a cover plate 16 which is secured to the shank by suitable screws11'7. The shank 15 has a vertical slot 18, therein and a stop pin 19 carried the 'and down movements of the auxiliary section 14 relative to the main section of the presser foot. A spring 20 attached to the main shank of the presser foot by a screw 21 bears on the upper end of the shank 15 and normally tends to force the lower surface of the auxiliary section of the foot into a plane lower than the plane of the lower surface of the main section of the presser foot.

The purpose of this auxiliary section is to clam and firmly hold the fabric sectiofi locater. at the right of the foot, as viewed in Fig. 5 when the same is of less-thickness than the fabric section at the other side of the foot. It sometimes occurs in the forming of garments that the fabricv section on oneside of the'seam is of double-thickness while the fabric section on the .other side of the seam is of single thickness. In Fig. 5 of the draw ings; I have shown such a condition where the material under the main section of the presser foot is indicated at f and f, while the material under the auxiliary section of the presser foot is of single thickness and is indicated at f. The spring 20 forces the auxiliary section down onto this single thickness of fabric f while the main foot section rests on tliedouble thickness of the fabric. It will thus be seen that both sections of the fabric will be firmly clamped.

My improved presser foot is particularly adapted for the guiding and holding of i'abric sections which are to have their edges abutte'd and joined to form a flat seam. The edge portions of the fabric sections are turned-up as clearly shown in Fig. 5 of the drawings, and led through the slot 13. A trimming-mechanism consisting of a stationary blade 22 and a movable blade 23 operates-to trim these up-turned edge por-' tions after which they are brought back into the plane of the fabric sections and united by t e stitching mechanism.

It will be noted that the slot 13 is located between the side edges of the main section 9 of the presser foot and. therefore. there is a section or finger 9' at one side of the upturned edge portions, while there is a section 9 at the other side of the lip-turned edge portions. These up-turned edge portions will, therefore, be guided and held in a vertical position while" they are being trimmed, and these sections 9' and 9. will also insure that these upturned edge portions, are trimmed, are turned back into flat abutted relation, as clearly shown in Fig. 6 of the drawings. In'other words, if the finger 9" were omitted the upturned the fabric section underneath the auxiliary section of the presser foot would be free and unguided above this auxiliary section am there would be a tendency of this unguided trimmed upturned edge portion to roll back onto the body portion of the fabric section. The finger 9, however, extending along the edge of the upturned fabric section referred to prevents this rolling 'back and insures that the upturned section will be guided back into the plane of the fabric section. The

-end wall of the slot guiding the upturned edge sections is smooth and unbroken and,

after they edge portion of therefore, there is no chance of the edges of i the fabric being caught as is the case where the auxiliary section forms one wall of the slot and has a movement relative to the main section.

The finger 9* is carried by a section 9 which is formed with the needle openings and this section may be removed. and replaced by a new section in case the stitch fingers extending into the nee-"lie openings are broken, which avoids the necessity of replacing the entire main section of the presser foot.

It is obvious tails of construction and the arrangement 0 parts may be made without departing from the spirit of the invention as set forth in the appended claims.

Having thus described the invention, what is claimed as new is z- 1. The combination of horizontally disposcd trimming blades. with a presser foot comprising a main toot portion having a needle opening and a slot extending from the front end of the foot substantially paralthat minor changes in the de.

lcl with the line of feed to a point in advance of and adjacent the needle opening, said slot In testimony whereof, I aflix my signaing located bfetig'eein the siidg edgesdof th; ture, in the presence of We WitnS main portion 0 t e oot an ein a a te 7 i to guide the upturned edge portiogs of a WILLIAM TOSNEY' 5 ric sections to the trimming blades, and an Witnesses:

auxiliary yielding foot extending alongside CHRISTIAN RQDEKURT, of the main foot portion. ROBERT C. MCKEE.

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