US1732564A - Cutting device - Google Patents

Description

0a. 22,1929. MA E 1,732,564

CUTTING DEVICE Filed Aug. 1927 2 Shoots-Sheet 1 IN V EN TOR.

A TTORNEYS.

E. MAYER CUTTING DEVICE Oct. 22; 1929.

File g- 1927 2 Shoots-Sheet 2 1. mam".

INVENTOR.

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Patented Oct. 22, 1929 UNITED STATES PATENT OFFICE EMIL MAYER, OF VIENNA, AUSTRIA, ASSIGNOR TO DREM PRODUCTS CORPORATION, OF NEW YORK, N. Y., .A CORPORATION OF NEW YORK CUTTING DEVICE Application filed August 5, 1927. Serial No. 210,755.

My invention relates to a new and improved cutting device.

One of the objects of my invention is to provide a cutting device adapted to cut paper, leather, cloth and the like.

1 Another object of my invention is to provide a cutting device in which the cutting blade or the frame or holder therefor is forced to move along the cutting edge of a guide plate or the like so that the knife and the frame thereof always occupy the same lateral relation with respect to the cutting edge.

Another object of my invention is to provide the guide edge (which is preferably straight) with a vertical surface upon which the cutting blade is caused to glide while guiding the movement of the said cutting blade by the co-operation of the frame there of with two other surfaces which are inclined to the first mentioned surface. For example,

the lower edge of the frame may be guided along one of these additional guide surfaces, and theside edge of the frame can be guided along the second of these additional guide surfaces.

These three guide surfaces may form right angles to each other or may be inclined to each other at any other angle. Likewise, they may have contours of any shape, such as suitably curved contours.

Byutilizing three guide surfaces, it is pos sible to prevent any lateral deviation of the blade from the desired line of cut, and it is possible to relatively regulate the depth of the cut and to prevent any undesired vertical movement of the blade which might be caused by the resistance of the material.

Another object of my invention is to provide a device especially adapted for utilizing 4O thin flexible blades, such as the flexible blades utilized in certain types of safety razors.

Another objectof my invention is to provide a device whereby the depth of the out can be regulated and I prefer to form the 5 lower surface of the knife or the frame thereof of such contour (as for example, a paraof the guide plate, said guide slot being adjacent the cutting edge of the guide plate. The three guide surfaces are then provided by the outer edge of the guide plate, by the adjacent top edge of the guide plate which is between said cutting edge and the guide head, and by the outer surface of the guide head.

Another object of my invention is to provide resilient means such as a spring or the like for normally holding the knife in the inoperative position (in which it will not cut) so that the depth of the out can be regulated by downwardly pressing the knife holder.

Other objects of my invention will be set forth in the following description and drawings which illustrate a preferred embodiment thereof, it being understood that the above general statement of the objects of my in vention is intended to merely generally explain the same, and not to limit it in any manner.

Fig. 1 is a front elevation of an embodiment of my invention.

Fig. 2 is a top elevation ofthe device shown in Fig. 1.

Fig. 3 is a front elevation of the device shown in Fig. 1.

Fig. 4 is a central sectional view of the device shown in Fig. 3.

Fig. 5 is an enlarged detail front elevation of the device.

Fig. 6 is a view similar to Fig. 5 and shows the rear of the device.

Fig. 7 shows the inner parts of the knife holder, when the same is in the inoperative or non-cutting position.

Fig. 8 is a view similar to Fig. 7, showing the knife in the lower or operative position.

The guide plate 15 is provided with recesses 16 and with an upstanding arm 12 provided with a longitudinal guide slot 13. The knife frame comprises an outer plate 19 having a finger hold 17 and an inner plate 22 having laterally inclined lugs 33 which project into the guide groove 13.

As shown in Fig. 2 the inner plate 22, which is made of springy metal, has a dished shape,'so that it has the same action as a blade spring.

The outer plate 19 is provided with projections 20 and 21 which extend through the corresponding holes of the blade B, and.

through a clamping plate 31. The clamping plate 31 has a central opening through which ascrew 26 connected to the outer plate 19 projects, and a nut 18 serves to hold the clamping plate 31 in proper position.

An inner screw 32 projects from the inner face of the plate 19, and this extends through ahole in the inner spring plate 22 which is held in proper position and under considerable pressure by means of the nuts 23.

The innerface of the plate 19 is provided with a cylindrical bolt or projection 35 which fits between the walls ,of the guide groove 13.

The inner face of the outer plate 19 is pro- -vided with a smaller projection 39 upon which a roller 36 is mounted. A spring 34 made of resilient metal is mounted as shown in Fig. 7.

r The spring 34 has a hook-like end which is connected to screw 32. The other or free end of said spring 34 abuts one wall of guide groove 13.

The action of the spring 34 is to normally hold the knife frame in the position indicated in Fig. 7, in which theknife blade B is in the upper or substantially inoperative position. By pressing down upon the finger hold 1 7, the edge ofthe knife B is caused to projectbelow the bottom of the guide plate 12,

to form a cut of regulated depth.

The bottom of the guideplate 12 may be provided with a facing 14 made of any suitable fabric. 7

As shown in Fig. 4, for example, the outer face of the'upstanding arm 12 is provided wlth a groove or depression having a bottom wall upon which the bottom of the outer plate 19 can slide. The bottom edge of the outer plate 19 is inclined to the bottom of the guide plate, so as to permit the depression of the knife frame into the position shown in Fig. 8.

However, some portion of the bottom edge of'the outer plate 19 is preferably in contact with the lateral guide surface S at all times.

Hence, the movement of the knife blade is guided by three surfaces, namely, the edge withwhich the knife blade B contacts, the

rear surface S of arm 12, and the surface of the guide projection 35.

It is obvious the depth of the out can be regulated at will and that a blade of any desired thickness and rigidity could be used.

It is also obvious that the guide surface S could be given any desired shape so that a out can be formed whose depth forms any desired pattern.

It is also clear that since the edges of the openings 16 are respectively parallel to and perpendicular to the direction of movement of the blade, that this permits the blade to be moved at right angles to any desired line or surface.

In order to regulate the maximum depth of the cut, the outer plate 19 is provided with a collar 28 whose interior is suitably threaded, and a set screw 27 is mounted in the collar 28. The position of the point of the set screw regulates the maximum depth of the out, because the point of the set screw 27 can contact with the top faces of the vertical arm 12.

It is also clear that the improved device renders it possible to start a cut within the periphery of a sheet of paper or the like.

I have shown a preferred embodiment of my invention, but it is clear that numerous changes and omissions could be made without departing from its spirit.

Claims:

1. In combination, a cutting blade, a frame adapted to hold said cutting blade, said frame comprising two separate frame members, a guide for said frame having a slotted arm, said frame members extending on opposite sides of said slotted arm, connecting means extending through the slot of said arm and holding said frame members together, one of said frame members being adapted to slidably abut the adjacent face of the said arm, and one of said frame members having a guide stud projecting through the said slot, the said frame being tiltable about said guide stud.

2. A device according to claim 1 including means adapted to limit the inclination of the said frame about the said stud.

3. A device according to claim 1 in which the said frame has an adjustable screw adapted to abut a lateral surface of the said arm to limit the inclination of the frame.

4. A device according to claim 1 includin" spring means connected to the said frame and movable in the said groove, the said spring means being adapted to urge the said frame to members to each other so that the first men tioned frame member is forced into sliding contact with the adjacent face of the said arm, and a guide stud connected to one of said frame members and slidable in the said slot.

6. A device according to claim 5 including a spring located in and slidable in the said slot, said spring having a hooklike end embracing a lateral projection of one of said frame members.

In testimony whereof I aflix my signature.

EMIL MAYER.

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