US1433474A - Trimming-machine attachment - Google Patents

Description

M. POETZSCH.

TRIWIMINGIMAGHINE ATTACHMENT. i

APPLICATION. FILED )UNE 25, 1921.

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TRIMMIN G--1VIACHINE ATTACHMENT.

Application filed June 25, 1921. Serial No. 480,297.

To all whom it may concern:

Be it known that 1, MAX POETZSCH, a citizen of the United States, and a resident of Ridgewood, in the county of Bergen and State of New Jersey, have invented a new and Improved Trimmingdrlachine Attachment, of which the following is a full, clear, and exact description.

This invention relates to an improved apparatus for cuttmg deslgns in fabric and has for an object to provide means for cutting away certain parts of the fabric in order to reduce the thickness thereof and thereby produce a design or configuration.

Another object of the invention is the productionof a device for forming designs by causing a strip of cloth either to be approached by a knife in such a way that cer tain parts will be reduced in thickness by the knife as the fabric passes the knife, the cutting of the fabric in these certain places producing a predetermined design accordin to the way the machine is manipulated.

n producing a machine according to the present invention, various form of mechanism may be utilized without departing from the spirit of the invention. In one form of the invention, namely, in the form shown in the accompanying drawings, means have been presented for causing a cloth having a nap to pass over a rest and simultaneously cause a cutter to operate on the nap. The parts may be adjusted to cause the cutter to shear the nap at a certain level continuously or be caused to shear the nap at different depths and thereby produce designs out into the nap.

In the accompanying drawings- Figure 1 is a fragmentary sectional view through Figure 2 approximately on line 1-1.

Figure 2 is a fragmentary front view of a trimming machine disclosing one embodiment of the invention.

I Figure 3 is a plan view of a strip of cloth after having passed through the machine shown in Figure 1.

Figure 4 is an enlarged fragmentary sectional view through Figure 3 on line l4@.

Referring to the accompanying drawings by numeral, 1 indicates a frame of a trimming machine of any desired kind provided with a rest 2 together with what is com.- monly known as a cylindrical knife 3. The detail structure of the frame 1 and knife 3 is old and well known and, therefore, will '3 is limited.

need no additional description. The knife 3 is mounted upon a pivotally mounted frame having an arm 4-, which arm and frame are-of theusual, construction and designed to be raised manually whenever it is desired to inspect the cloth or the rest or for any other purpose. However, certain additional features have been added to these old parts as hereinafter fully described.

The knife 3 may be driven by any desired means, as for instance, a belt arranged on the driving point 5 whereby the knife is allowed certain pivotal movement without molesting the belt or other driving means. Arranged 011 the arm. a is a locking bracket 6 provided with a catch 7 designed to engage a notched wheel 8 formed upon a nut 9 whereby the nut is prevented rotary movement while the notched wheel 8 is in engagement with the projection or catch 7. The nut 9 is threaded upon a pin 10 which is slidably mounted in the arm 4. and caused to loosely rest upon a support 11, which support is formed integral with or rigidly secured to the framework 1 whereby the downward movement of the arm at and knife By properly adjusting the nut 9 on the pin 10, the distance between the knife 3 and rest 2may be varied as desired.

From Figure 2 it will be seen that the rest 2 is a cylindrical member provided with spiral rest members 12 which extend from one end of the rest to the other. The rest 2 is rotated by a sprocket wheel 13 at any desired speed while the knife 3 is rotated at the usual speed which is comparatively great. The speed of rotation of the rest 12 and the speed of travel of the fabric 14. determines the angle at which the grooves 15 are formed. It will be understood that the cloth must first be properly sheared to get the right height of nap be fore passing over the rest 2. As the cloth passes over the rest 2, certain parts thereof will be elevated or raised by the spiral rest members 12 while the remaining part will sag down as the cloth is under some considerable tension when passing over the rest. This gives the knife 3 an opportunity to produce a clear cut or shearing action for providing the grooves 15.

From the above construction and arrangement, means are presented. which will carry out the objects of the invention and will produce by successive steps, out designs of various kinds. It will also be noted that the designs may be cut by passing a piece of fabric over a rest adjacent a knife and causing the knife to approach the fabric. By varying the height of certain parts of the rest or by moving the knife back and forth, different forms of groove may be produced.

That I claim is 1. In a machine for cutting designs on fabric, a cutting device, means for moving the strip of fabric past said cutting device,

and a rotatable rest for holding said strip of fabric adajacent said cutting device, said rest having spirally arranged rest members for rotating said rest at a different rate of speed to the travel of the fabric whereby diagonal grooves will be cut in the fabric.

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