US2026363A

US2026363A - Electric web cutting machine

Info

Publication number: US2026363A
Application number: US43680A
Authority: US
Inventors: Schiller Saul
Original assignee: Individual
Current assignee: Individual
Priority date: 1935-10-05
Filing date: 1935-10-05
Publication date: 1935-12-31
Anticipated expiration: 1952-12-31

Description

Dec. 31, 1935.

s. SCHILLER 2,026,363

ELECTRIC WEB CUTTING MACHINE Filed Oct. 5, 1935 I Sheets$heet l 1 42 4/ kl. 21 I Z I I I 1' 1&5 '4- 1 0 lg K i -23 I I 2 l I 5 I a 4 I L J I -L I! 5| J 40 III l 0 I. il"

. .3 3a 31 1 -4- INVENTOR SAUL SCHILLER.

ATTO N EY Dec. 31, 1935. .s. SCHILLER 2,026,363

ELECTRIC WEB CUTTING MACHINE Filed Oct. 5, 1955 5 Sheets Sheet 2 INVENTOR 84 U1. SCHILLER ATTORNEY Dec. 31, 1935. s. SCHILLER 2,026,363

ELECTRIC WEB CUTTING MACHINE Filed Oct. 5, 1935 s Sheets-Sheet s INVENTOR SAUL Sc/01.4512

ATTORNEY Fatented Dec. 31, 1935 UNITED STATES PAT'ENT OFFICE 11- Claims.

This invention relates to new and useful improvements in a foot operated electric web'cutting machine. p

The invention has for an object the construction of a device as mentioned which is characterized by a motor driven cutter arranged so that the cutter moves forwards 'under mechanical control to cutwebs and other strips of materials to precise lengths.

More particularly, the invention has specific reference to a novel arrangement for causing'the electrically driven cutter to move forwards and rearwards.

S till further the invention contemplates the provision of a housing in which a motor is movably mounted and upon the shaft: of which a disc cutter is fixed, and an arrangement for moving the position of the motor so that it moves back and forth underthe foot control of the operat or.

Still further the invention proposes the provision of a guard which'ren'd'ersthe operator immune to; injury from the circularknife. The guard is rigidly attached to the moving system and covers nearly all the exposed segment of the cutter except for the area devoted to the entry of the web.

A further object of the invention is the provision of a sharpener element, the manipulation of which sharpens either edge of the dis'ccutter when desired.

Another object of the invention is the construction of a device as described which is safe, simple and reliable in operation and which may be manufactured and sold at a reasonable'cost.

For further comprehension of the invention, and of the objects and advantages thereof, reference will be had to the following description and accompanying drawings, and to the appended claims in which the various novel features of the invention are more particularly set forth.

In the accompanying drawings forming a material part of this disclosure:

Fig. 1 is aperspective View of a device con-,

Fig. 5 is a fragmentary enlarged sectional view taken on the line 5-5 of Fig. 4.

Fig. 6 is a sectional view taken on the line 66 of Fig. 5.

Fig. 7 is a sectional view taken on the line 1-1 5 of Fig. 5.

Fig. 8 is a. fragmentary perspective view of a portion of Fig. 5 seen as though looking in the direction of the line 8-8 of Fig. 5.

Fig. 9 is a fragmentary sectional view on the 10 line 9+9 of Fig. 5.

Fig.'10 is a fragmentary perspective view of a portion of certain mechanism of the device.

Fig. 11 is a perspective view of the working surface plate used in the device.

Fig. 12 is a sectional view taken on the line .|2 |2 of Fig. 6.

Fig. 13 is a fragmentary elevational viewlooking in the direction: of the line l3-l3 of Fig. 12.

Fig. 14 is a horizontal sectional view takenon the line |4-M of Fig. 13.

Fig. 15 is a horizontal sectional view taken on the line l 5-l5 of Fig. 13.

Fig. 16 is fragmentary sectional View taken on the line [G -l6 of Fig. 6.

The foot operated electric web cutting machine, according to this invention, comprises a casing Ill and a motor ll slidably mounted in the casing. The casing is in the form of a box having a body section I6 and a lid section I51 The lid section a is connected with the body section along one edge by the hinges I2. Thus, the cover section may be hingedly opened as indicated by the dot and dash lines in Fig. 1. The cutting ma'chineiis shown mounted upon a table I3} This table is provided with two racks ii and M into which the cut web is deposited and stacked. Attached to each rack is a rulerl5 for the convenient measurement of required length. Rack I4 is fixed at right angles with respect to the cutter for a transverse cut; rack M is fixed at an angle for a bias cut.

The motor II is mounted upon a platform IE to which is attached a pair of axles l1. These axles receive ball bearing rollers I8 which are free to run on tracks [9. The tracks are fastened down inside the rectangular framework [9 mounted within thecasing and extending from the front to the rear. The framework comprises angle-shaped members, one corner of which is v clearly indicated in Fig. 8, l9 is a removable fiat member which when attached prevents the entry of dirt, etc. onto the tracks.

Adisc cutter 20 is clamped between the flanges of thearl'icrfll The cutter with its arbor is 5 mounted on the motor shaft. The cutter is shielded by a guard 25. The guard is in the form of an inverted receptacle and mounted on a frame 26 supported by several legs 2'! upon the body of the motor. Fig. 16 shows the assembly of the guard. The substantially F-shaped left side projection 25 of frame 26 is attached to the motor, and the right side 25 is in the form of a plate which is fastened on by machine screws. The shearing slot 25 is formed by adding thickness to the lower inside surface of the two sections. The bottom edge of the assembled guard 25 is slightly spaced from the surface of the working plate 2|. This arrangement is indicated by 21 of Fig. 6. The working distance 21' is limited to the height of only a few layers of the web.

The working surface plate 2i is placed over the cut-out area 23 of the cover when it is closed. The plate is held in position by screws so that it may be readily removed or replaced when desired. To provide a free passage for the guard and knife protruding above the lid, the plate is slotted as shown in Fig. 11.

Lines

53 and 54 are scribed on the plate and serve as web guide lines for the straight and bias cut respectively.

A resilient means is provided for normally urging the motor into a rearward position. This means comprises a spring 28 having one of its ends attached upon the support bar 2'1 and its other end'attached to the framework IS In other words, one of the ends of the spring 28 is fixed to a stationary part, while the other of the ends connect with the displaceable motor so that the motor is normally urged into the said rearward position.

A novel arrangement is provided for moving the motor forwards during its rotation. This means includes a flexible strip 30 preferably leather, or a rubber canvas belt extending from the front to the rear along the ways of the framework. At the front the flexible stationary band 31% is fixedly held upon a stationary post 3|. The band 3:? extends over the pulley portion of the disc cutter arbor 2B- or over a portion of the shaft of the motor. The former condition is indicated clearly in Fig. 6 of the drawings. The rear end of the flexible band 30- connects with a lever 32 which is pivotally mounted by a pintle 33 upon the post 30.

A spring 34 normally urges the lever 32 into a raised position. A cable or chain 35 connects with the lever 32 and extends downwards through openings in the bottom of the casing and the table to a foot pedal 36. This foot pedal is pivotally mounted at its rear upon the floor bracket 31. The cable 35 connects with the toe end of the foot pedal so that when the latter element is depressed, the lever 32 will be moved downwards and force the flexible band 39 against the rotating part (see Fig. 6). This contact will cause the motor to move bodily forwards until it is arrested at the front position. A limiting means in the form of a resilient strong leaf 38 is mounted upon the front side of the frame lfl and is equipped with a rubber bumper 40 which is adapted to engage against the side of the motor body when the motor reaches the fully forward position. At the rear there is also a leaf spring 4| mounted upon the rear side of the frame and equipped with a rubber bumper 43. Thus, the motor is limited in its rearward travel and confined to the ways of the angle frame.

A sharpening device is associated with the guard 25 by which the disc cutter may be sharpened when desired. This sharpening device includes a vertical shaft 45 free to turn in a boring 45 at the rear end of the guard 25. At the lower end of the shaft 45 there is a fixedly held joint 46 which connects with a bracket 41 supporting a rotatively mounted grinding stone 48. The wheel 48 is supported at an angle, as shown in Fig. 13, and may be swivelled into operative positions. As illustrated, it is in the inoperative position. One side or the other side of the disc cutter may be sharpened by merely turning the knob 49 which is attached upon the top of the vertical shaft 45. When this knob is turned in one direction the grinding disc 48 will be swivelled around, as indicated by the dot and dash lines 48* in Fig. 14, and engage against one side of the disc cutter. When the knob 49 is turned in the other direction, the disc 48 will assume a position indicated by the dot and dash lines 48 in Fig. 14, and then will be capable of sharpening the other side of the disc cutter.

An electric switch 50 is mounted on the cover section l0 of the casing by which the electric motor may be turned on and off. The cables for the motor and for the switch are not illustrated on the drawings since they form no part of the invention and persons skilled in the art will readily understand how to wire the motor. The casing I0 is also provided with handles 5| by which it may be conveniently carried during transit. A counter 52 is mounted upon the top of the surface plate 21 and is adapted to count each time that the motor is moved to the forward position. Thus, an operator may keep track of the number of pieces of web cut. The details of the counter will not be given in this specification as any conventional counter may be used which adds one digit every time the counting lever is oscillated through a certain angle.

The cutting procedure is as follows: The web material is placed over the slot 22 of the working surface plate and the free end extended over the ruler and brought up to the desired graduation. That is, the right hand brings the free end of the web to the mark and measures out specific lengths either on the straight or bias ruler; the left hand holds the web on the surface plate. Then it is merely necessary to depress foot pedal 36, whereupon the motor moves forward and cuts the web.

The operation of the device is as follows:- Stepping on the pedal draws the cable 35 which engages the band 30*- against a rotating part associated with the motor. The contact will cause the motor to move forwards. As the motor moves forwards, the spring 28 will be stretched and await an opportunity to move the motor back into the original position. At the extreme forward position of the motor it will be arrested by the bumper 40. When the pedal 35 is released the spring 28 will draw the motor back to the rear position, at which position it will be arrested by the bumper 43. The forward motion of the disc cutter will have cut the web material on the surface plate.

While I have illustrated and described the preferred embodiment of my invention, it is to be understood that I do not limit myself to the precise construction herein disclosed and the right is reserved to all changes and modifications coming within the scope of the invention as defined in the appended claims.

Having thus described my invention, what I claim as new, and desire to secure by United States Letters Patent is: V

I. A foot operated electric web cutting machine, comprising a casing, a motor movably mounted in said casing, a disc cutter on the shaft of said motor, a working surface plate with a' slot through which said disc cutter projects, resilient means for urging said motor rearwards, a flexible stationary band extending from the rear to the front, and means for lowering said flexible band to contact with said rotating shaft or associated part of the motor to cause the motor to move forwards.

2. A foot operated electric web cutting machine, comprising a casing, a motor movably mounted in said casing, a disc cutter on the shaft of said motor, a working surface plate with a slot through which said disc cutter projects, resilient means for urging said motor rearwards, a flexible stationary band extending from the rear to the front, and means for lowering said flexible band to contact with said rotating shaft and associated part of the motor to cause the motor to move forwards, said casing being in the form of a box having a cover which may be moved to expose the interior mechanism of the device.

3. A foot operated electric web cutting machine, comprising a casing, a motor movably mounted in said casing, a disc cutter on the shaft of said motor, a working surface plate with'a slot through which said disc cutter projects, resilient means for urging said motor rearwards, a flexible stationary band extending from the rear to the front, and means for lowering said flexible band to contact with said rotating shaft or associated part of the motor to cause the motor to move forwards, said motor being movably mounted by reason of being supported on a platform to which axles are attached and on the ends of which there are ball bearing rollers engaged in tracks mounted within said casing.

4. A foot operated electric web cutting machine, comprising a casing, a motor movably mounted in said casing, a disc cutter on the shaft of said motor, a working surface plate with a slot through which said disc cutter projects, resilient means for urging said motor rearwards, a flexible stationary band extending from the rear to the front, and means for lowering said flexible band to contact with said rotating shaft or associated part of the motor to cause the motor to move forwards, said working surface plate being removably attached on said casing and in which the adjacent edges are formed with cut-out parts to form said slot.

5. A foot operated electric web cutting machine, comprising a casing, a motor movably mounted in said casing, a disc cutter on the shaft of said motor, a Working surface plate with a slot through which said disc cutter projects, resilient means for urging said motor rearwards, a flexible stationary band extending from the rear to the front, means for lowering said flexible band to contact with said rotating shaft or associated part of the motor to cause the motor to move forwards, and a guard for the projecting part of the disc cutter supported in position upon the body of the motor.

6. A foot operated electric web cutting machine, comprising a casing, a motor movably mounted in said casing, a disc cutter on the shaft of said motor, a working surface plate with a slot through which said disc cutter projects, resilient means for urging said motor rearwards, a flexible stationary band extending from the rear to the front, means for lowering said flexible band to contact with said rotating shaft or associated part of the motor to cause the motor to move forwards, and aguard for the projecting part of the disc cutter supported upon the body of the motor, said resilient means comprising a spring connected by the said motor and a stationary part. '5

7. A foot operated electric web cutting machine, comprising a casing, a motor movably mounted in said casing, a disc cutter on the shaft of said motor, a working surface plate with a slot through which said disc cutter projects, 10 resilient means for urging said motor rearwards, a flexible stationary band extending from the rear to the front, and means for lowering said flexible band to contact with said rotating shaft or associated part of the motor to cause the motor to move 15 forwards, said resilient means consisting of a spring connected with a support mounted within the casing and a support mounted on the motor.

8. A foot operated electric web cutting machine, comprising a casing, a motor movably 20 mounted in said casing, a disc cutter on the shaft of said motor, a working surface plate with a slot through which said disc cutter projects, resilient means for urging said motor rearwards,

a flexible stationary band extending from the rear 23 to the front, and means for lowering said flexible band to contact with said rotating shaft or associated part of the motor to cause the motor to move forwards, said flexible stationary band comprising a strip of leather. 30

9. A foot operated electric web cutting machine, comprising a casing, a motor movably mounted in said casing, a disc cutter on the shaft of said motor, a working surface with a slot through which said disc cutter projects, re- 35 silient means for urging said motor rearwards,

a flexible stationary band extending from the rear to the front, and means for lowering said flexible band to contact with said rotating shaft or associated part of the motor to cause the 40 motor tomove forwards, said flexible stationary band being permanently attached at one end, and the other end thereof being lowerable for engaging the band against said rotating part.

10. A foot operated electric web cutting ma- 45 chine, comprising a casing, a motor movably mounted in said casing, a disc cutter on the shaft of said motor, a Working surface plate with a slot through which said disc cutter projects, resilient means for urging said motor rearwards, 50 a flexible stationary band extending from the rear to the front, and means for lowering said flexible band to contact with said rotating shaft or associated part of the motor to cause the motor to move forwards, comprising a pivotally supported lever connected with the band, resilient means urging said lever into raised position, a cable connected with said lever by which it may be lowered, and a foot pedal for lowering said cable. 60

11. A foot operated electric web cutting machine, comprising a casing, a motor movably mounted in said casing, a disc cutter on the shaft of said motor, a working surface plate with a slot through which said disc cutter projects, 65 resilient means for urging said motor rearwards, a flexible band extending from the rear to the front, and means for lowering said flexible band to contact with said rotating shaft or associated part of the motor to cause the motor to move forwards, comprising a cable adapted to be manually moved and connected for moving said flexible bandinto said contacting position.

SAUL SCHILLER. 75