US1983842A

US1983842A - Cutting press

Info

Publication number: US1983842A
Application number: US685672A
Authority: US
Inventors: Drucker Abraham
Original assignee: Individual
Current assignee: Individual
Priority date: 1933-08-18
Filing date: 1933-08-18
Publication date: 1934-12-11
Anticipated expiration: 1951-12-11

Description

- Dec. 11, 1934. A. DRUCKER 1,983,842

CUTTING PRESS Filed Aug. 18, 1953 5 Sheets-Sheet 2 INVEN TOR.

ABRAHAM DRUG/(ER BY ATTORNEY Dec. 11, 1 934. A DRUCKER 1,983,842

' CUTTING PRESS Filed Aug. 18, 1933 3 Sheets-Sheet 3 mrqszvrozm ABRAHAM URI/ER ATTORNEY Patented Dec. 11, 1934 UNITED STATES PATENT OFFICE CUTTING PRESS Abraham Drucker, New York, N. Application August 18, 1933, Serial No. 685,672 7 Claims. (01.164-26) This invention relates to a new and improved hand press for converting manual pressure on the hand lever to enormous pressure at the working points of the mechanism and is an improvement on my cutting-press shown and described in Letters-Patent of the United States No. 1,907,757, issued to me May 9, 1933.

, An object of this invention is to provide an improved cutting-press having a toggle joint for exerting an enormous pressure suitable for outting-dies used for cutting up in one operation a large number of layers of cloth, leather, or paper into all sorts of shapes.

Another object of this invention is to provide a cutter-carrier which is pivotally mounted to swing in a horizontal plane from a non-cutting position into cutting position in alignment with the plunger, and in providing yielding means for maintaining the alignment of the cutter-carrier and the plunger.

Another object of this invention is to provide a vertical shaft mounted to slide adjacent to the upright wall of the frame and on which the cutter-carrier is designed to pivot, the said'shaft having an arm adjustably secured at its upper end and resting on a supporting member, the said cutter-carrier being mounted at the lower end of the vertical shaft and being supported jointly with the cutter in an elevated position above the work supporting surface.

Another object of this invention is to cause said mechanism to cooperate so that when the operator uses one hand to move the handle and causes the plunger to move up and down, the cutter-carrier and cutter will automatically follow the movements of the plunger, and the operator may use his other hand for shifting'the material being cut up.

Another object of this invention is to form the cutter-carrier of two relatively rotatable members, a rear member pivotally mounted on the vertical shaft and having a shaft projecting horizontally therefrom, and a front member mounted on said horizontal shaft and comprising cuttergripping means, thus making it possible. to reverse the cutter-gripping means and the cutter for'expelling the cut blanks from the cutter.

With the above and other objects in view the invention will be hereinafter more particularly described, and the combination and arrangement of parts will be shown in the accompanying drawings and pointed out in the claims which form part of this specification.

Reference will now be had to the drawings wherein like numerals of reference designate corresponding parts throughout the several views, in

which:

Figure 1 is, a side elevation of my improved cutting-press in operating position.

Figure 2 is a plan view ofthe cutting-press. 5

Figure 3 is a sectional view taken as on line 33 in Figure 1 and shows the cutting-die in W positions.

Figure 4 is a. sectional view taken as on line 4-4 in Figure 1.

, Figure 5 is a sectional view taken as on line 5-5 in Figure 3. I

Fig. 6 is a sectional view taken as on line 6-6 in Fig. 3. Figure 7 is a sectional view taken as on line 7-7 in Fig. 2. Figs. 8 and 9 show a modified actuating mechanism.

In the illustrated embodiment of the invention, the several views show a outing-press 10, comprising an open-side frame having a T-shaped upright wall 11, a plunger-housing 12, depending from an overhanging T -shaped wall 13, and a flat base-plate 14 preferably of box section, Slidingly mounted for vertical reciprocation in the plunger-housing 12 is a composite cylindrical plunger 15, having a bifurcated upper end 16, and a pivot pin; 17. Mounted on a pivot pin or fixed abutment 18 disposed within bearings in a bifurcated extension 19, at the upper end of a plungerhousing 12, is a toggle-link 20, which is pivotally connected at a hinge pin 21 to a toggle-link 22. The other end of the link 22 is pivoted to the pin 17. The

links

20 and 22 are preferably of equal length.

The

links

20 and 22 are at an obtuse angle to one another, the obtuseness of which is sufficient to provide an effective toggle action. A link or arm 23 is connected atone end to the hinge pin 21 and at the other end to a pin 24, secured in eccentric relation to a disk 25. The disk 25 is secured to a shaft 26 disposed within a bearing 27 at the top of the frame. A hand lever 26 is secured to the shaft 26 and serves to impart a limited rotary displacement to the shaft 26 and to the pin 24 and causes the arm 23 to exert a moving force at the hingepin 21 and the plunger 15 to reciprocate in the plunger-housing 12. A pin 29 has been secured to the frame below the arm 23 and serves as a limiting stop to prevent the toggle motion from passing the dead center.

A shaft 30 is slidably mounted in an aperture in the overhanging wall 13 and in an aperture in a lug 31. The shaft 30 is adapted to slide in spaced relation and parallel with the plungerhousing 12. An arm 32 is adjustably secured at 55 jecting from the disk 25. The other end of the arm 32 is secured to an upright pin 35, which is slidably housed in an aperture in the lug 31. A

cutter-carrier 36 is mounted at the lower end of the shaft 30.

As best shown in Figure 4, the cutter-carrier 36 comprises an angularly shaped rear member 37, having a lug 38 and a threaded member 39, adapted to abut in adjusted relation against a pin 40 projecting from the shaft 30 and housed in a slot 41 in the member 37. is thus supported in a vertical position and adapted for rotation in a vertical plane about the shaft 30 by means of the pin 40. The cutter-carrier 36 also comprises a front member 42, having an integral shaft 43 projecting therefrom, the shaft being rotatably mounted in a horizontal plane in an elongated aperture in the rear member 37. As shown in Figure 4, the slot 41 in the rear mem-' ber 37, extends through an angle of approximately ninety degrees and permits the cutter-carrier 36 to swing in a'horizontal plane from a noncutting position into cutting position and central alignment with the plunger 15, the central alignment being predetermined by adjusting the threaded member 39 against the pin 40, according to the diameter of the cutting-die 44. As shown in Figure 3, the front member 42 of the cutter-carrier 36 consists of V-shaped jaws and an integral extension 45 preferably of square cross-section. An arm 46 having a square aperture tofit the extension 45 is slidably mounted thereon and is fitted with a threaded member 47 at its free end, the threaded member 47 being secured in central relation with the V-shaped jaws 42. The cylindrical handle or shank 48 of the cutting-die 44 may thus be placed in the V- shaped f-ront member 42 and the arm 46 slidably adjusted on the extension 45 so that the threaded member 47 abuts against the shank 48. By adjusting the member 47, the cutting-die 44 is secured in the cutter-carrier 36. By adjusting the threaded member 39 against the pin 40 the cutting-die 44 is brought into central alignment with the plunger 15.

A sheet of material 49, to be cut up into any desired shape as predetermined by the cutting die 44, is placed upon a piece of backing material 50, adapted to be shifted on the base plate 14. When the hand lever 28 is operated, it causes the cutting die 44 to cut through the material 49, and the cutting edge of the cutting die enters slightly 5 into the upper surface of the backing material 50. The operator then repeatedly shifts the backing material and the material to be cut up with one hand while he operates the actuating mechanism, causing the cutting die to move up and down with the other hand.

As shown in Figure 5, the rear member 37 of the cutter-carrier 36 has been provided with a slot 51 extending through an angle of about one hundred and eighty degrees. A threaded member 52 is screwed into the shaft 43, and is housed in the slot 51 and permits the front member 42 of. the cutter-carrier 36 to swing about the shaft 43 from cutting position into a reversed and noncutting position, shown in dot-and-dash lines in Figure 3. The operator then reverses the cuttingdie and removes the cut blanks therefrom. The cutting-die may then be reversed into its normal upright operating position and swung back into alignment with the plunger-15, as shown in Figure 1, and another piece of material 49 may be cut up.

The cutter-carrier 36 As shown in Figure 6 the circular periphery of the sliding shaft 30 has been cut away at its lower end 53 to form a flat surface 54. The rear member 37 is provided with an aperture 55 housing a pin 56 and a coil spring 57. The coil spring 57 has been placed between the free end 58 of the shaft 43 and the free end 59 of the pin 56. When the shaft 43 is mounted in the rear member 37, the spring 57 is compressed and forces the pin 56 against the flat lower en'd'portion' 53. It is to be noted that the shaft 30 is secured against rotation by means of a slot 60 adapted to receive the threaded member 33 and that the flat surface 54 of. the lower end portion 53 is cut facing the center line of the plunger 15, and when the cutter-carrier 36 adjacent to the center line of the plunger it is automatically forced into alignment with the plunger 15. It is also to be noted that when the cutter-carrier 36 is swung out to the non-cutting position shown in Figure 3, that the spring 57'exerts a pressure against-the circular periphery of the shaft 30 and causes the cutter-oarrier to remain in'frictional engagement at the said position. 4

As shown in Figure 7, the composite plunger 15 comprises the bifurcated upper member 16 having a threaded lower end 61 and a flanged lower member 62 having a threaded aperture 63. It is thus possible to rotate theflanged lower member 62 about the threaded non-rotatable upper membe1 16 andvary the length of the composite plunger l5 and thus compensate for variations in the length of the shanks 48 of the cutting-dies 4'4, and to cause the cutting to be completed only when the toggle-links are substantially in a straight line and in alignment with the center line of the plunger.

Referring to the fragmentary portions of a cutting-press shown in Figures 8 and 9, it will be seen in Figure 9 that I have provided a modified form of" actuating mechanism comprising an abutment 64 having a crank 65 mounted thereon. A crank pin 66 is secured to the crank at its free end and a link 67 is mounted thereon. The lower end of the link 67 is secured to a pin 68 housed in the bifurcated upper end 16'of the composite cylindrical plunger 15. As shown Figure 8, an eccentric member 69 has been secured to the abutment 64 at one end and a hand lever 70 has been secured at the other end of the abutment. An arm 71 is adjustably secured at the upper end of the sliding shaft 30 by means of a threaded m mber 72 and is pivotally secured to a lever 73 by means of a pivot pin 74. The lever 73 is pivotally mounted on a pivot 75 fastened to' the bifurcated extension 76 at the upper end of theplunger housing '77. When the operator swings the hand lever 70 forwardly the eccentric member 69 permits the lever 73 to rise at the forward end and the sliding shaft 30 to be lowered due to its own weight and to follow the downward movement of the plunger 15. When the operator swings the hand lever 70 rearwardly the eccentric member 69 actuates the lever 73 about the pivot 75, causing the front portion of the lever to be lowered and the sliding shaft 30 to be lifted and to follow the upward movement of the plunger 15.

Operation The cutter-carrier 36 and the sliding shaft 30 are supported in an elevated position above the base plate 14, by securing the threaded member 33 in the slot 60' of the shaft 30 and causing the arm 32 to rest upon the pin 34. The operator secures the cutting die 44 in the front member 42 of the cutter-carrier 36 and rotates the flanged lower member 62 of the composite plunger so that the plunger contacts with the shank 48 of the cutting die 44. The workman operating my cutting-press stands at the front end. of the machine and shifts the backing material 50 and the material 49 to be cut up with one hand while actuating the cutting die 44 by means of the hand lever 28 with the other hand. It is to be noted that while I have shown the plunger of my cutting-press as operated by hand by means of a hand lever, that I may operate the plunger by foot power or by motive power, such as by an electric motor and by means of intermittent actuating mechanism.

While I have illustrated my cutting-press as utilizing a cutting die performing a cutting action, it is obvious that I may employ dies or tools which will perform other functions. I do not, therefore, limit myself to the type of cutting-die shown in the drawings, as I contemplate in connection with my cutting-press the manufacture of quite a number of tools designed for performing different functions but being interchangeable and adapted to the structural principles of my cutting-press. It is also to be noted that under all modes of actuating my cutting-press, the cutting-die is supported in an elevated position above the work supporting surface or backing material 50 and is independent of the plunger when in alignment therewith.

Having thus described my invention, what I claim is:

1. In a cutting-press of the character described, comprising an open side frame, a plunger housing, a plunger and a flat base plate, a shaft positioned in spaced relation parallel to said plunger and being slidably mounted, a cutter carrier mounted at the lower end of said shaft and adapted to grip and support a cutting die below said plunger, said cutter carrier being rotatably mounted on said sliding shaft and having means for aligning said plunger and cutting die, a toggle mechanism including a central hinge pin, a link having one end connected to said hinge pin and the other end connected to a pin eccentrically mounted in operative relation with a drive shaft, means for actuating said drive shaft, an arm secured at the upper end of said slidable shaft, and resting on a pin eccentrically mounted in operative relation with said drive shaft for elevating said shaft, said cutting die being constrained by said elevating means to follow the movements of said plunger.

2. In a cutting press of the character described, comprising an open side frame, a plunger housing, a plunger and a base plate, a shaft positioned in spaced relation parallel to said plunger and being slidably mounted, a cutter-carrier mounted at the lower end of said shaft and adapted to grip and support a cutting-die below said plunger, said cutter carrier being rotatably mounted on said sliding shaft and having means for aligning said plunger and cutting-die, a toggle mechanism for actuating said plunger, means for actuating said drive shaft, an arm adjustably secured in an elevated position on said slidable shaft, and contacting with an eccentrically mounted member, said eccentrically mounted member being in operative relation with said drive shaft for actuating said sliding shaft.

3. In a cutting-press having a vertically reciprocable plunger, a cutter-carrier comprising a rear member slidably mounted jointly with a vertical shaft, said rear member having a radial extension, a front member mounted on said radial extension and having means for gripping a cutter, means for elevating and lowering said cutter-carrier and cutter to cause the cutter carrier to follow the vertical movements of said plunger, and means for aligning said cutter carrier and cutter with said plunger in cutting position.

4. In a cutting press having a reciprocable plunger, a cutter carrier comprising a rear member slidably mounted in spaced parallel relation with said plunger and jointly with a vertical shaft, said rear member having a radial extension and having means for gripping a cutter, means for elevating said cutter carrier and cutter concomitantly with said plunger and means for aligning said cutter carrier and cutter with said plunger in cutting position, said cutter carrier and cutter being adapted for movement out of cutting position and being reversible when in said position.

5. In a cutting press having a reciprocable plunger, a cutter carrier comprising a rear member slidably mounted in spaced parallel relation with said plunger and jointly with a vertical shaft, said rear member having a radial extension and having means for gripping a cutter, means for elevating said cutter carrier and cutter concomitantly with said plunger and means for aligning said cutter carrier and cutter with said plunger in cutting position, said cutter carrier and cutter being adapted to swing out of cutting position and being reversible when in said position, means permitting said cutter carrier to remain at the point of maximum swing and for aligning the cutter carrier and cutter with the plunger when adjacent to the centre line of the plunger.

6. In a cutting press having an actuating mechanism comprising two hinged links, a composite vertically reciprocable plunger adapted to actuate dies having unequal height shanks, means for adjusting the length of the plunger to compensate for variations in the length of the shanks, said means comprising a telescoping plunger of two threaded members, the lower of said members being rotatable and longitudinally movable about the upper member, the upper member being hinged to one of said links and not adapted to rotate.

'7. A cutting press comprising a vertically reciprocable plunger, a cutter carrier mounted for movement with said plunger, said cutter carrier having means for gripping a cutter, means for elevating said cutter carrier and cutter concomitantly with said plunger and means for aligning said cutter carrier and cutter with said plunger in cutting position, said cutter carrier and cutter being adapted for movement out of cutting position.

ABRAHAM DRUCKER.