US2540227A - Power corner cutter - Google Patents

Description

Feb. 6, 1951 R. ABERLE POWER CORNER CUTTER 3 Sheets-Sheet 1 Filed Jan. 9, 1947 ENToR.

R0 )fI ABE/ME 5I BYV HTTOHNEY Feb. 6, 1951 R. ABl-:RLE 2,540,227

POWER CORNER CUTTER Filed Jan. 9, 1947 3 Sheets-Sheet 2 l I l l INVENTOR.

Feb. 6, 1951 R. ABERLE POWER CORNER CUTTER 3 Sheets-Sheet 5 Filed Jan. 9, 1947 v BERLE Patented Feb. 6, 1951 2,540,227 POWER -ooRNER CUTTER Roy Aberle, Portland, Maine, assignor to Southworth Machine Company, Portland, Maine, a

company of Maine Application january 9, 1947, 'serial N0. 721,044

My present invention relates to cutting machines, particularly to machines for cutting or punching holes, slots, or shapes in paper, and more particularly to machines for cutting or trimming the corners of sheets of paper to any desired contour or radius. y y

An object of the invention is an improved machine for cutting or punching holes, slots, or ir:- regular shapes in a pile of sheets of paper or like material. y

Another object is an improved machine for cutting or trimming the corners of a stack of sheets to any desired contour or radius.

A further object is the provision of a simple, durable, and compact mechanism for the binding and cutting heads in a machine of this character.

A further object is an accurate and easy adjusting means for the binding and cutting heads.

A still further object is' the provision of means for confining the cut on chips resulting from the operation of the machine within a given space for ready removal.

Other objects and novel features of the construction and operation of the parts comprising my machine wnl appear as the description of the invention progresses.

In the accompanying drawings illustrating a' preferred embodiment of my invention:

Figure 1 is a front elevation; partly broken away.

Figure 2 is 'a side elevation, partly in section.

Figure 3 is an enlarged sectional elevation taken on the line 3-3 of Fig. 2, and looking in the direction of the arrows.

Figure 4 is a sectional View, taken on the line c i of Fig. 3, and looking in the direction of the arrows, and

Figure 5 is a sectional plan view, taken on the line 5 5 of Fig. 2, and looking in the direction of the arrows.

Referring to the drawings there is shown a base l0,- preferably of cast iron, and of any suitable dimensions,- having secured thereto and extending upwardly therefrom, rear pedestal legs H and front pedestal legs l2. Mounted on the top o'f the legs ll and l2 and bolted thereto is an apron I3.

The base Eli, legs il and t2, and apron i3 coristitute an open structure to be later closed with suitable side plates and door. However, these have not been shown, nor will they be referred to further, as they are not of the essence of the present invention. Bolted to the rear legs l! isa frame i!! having formed therein a slideway I5 in which is mounted for reciprocation a cutter slide i6.

6 Clans; (Cl. 164-51) Also 'formed in the frame i4, in the rear of the slideway l5 and lying parallel to such slideway l5 (see Fig. 5) is a clamp slideway lea in which is s'lidably mounted the clamp member or binder slide 63a which carries the clamp or binder foot 63.

A cast iron table section I7 is mounted on and secured to the top of the apron `I3 and is surrounded by a wood table I8. Secured to the table section Il, in any suitable manner, is a stationary cutting die IS (see Fig. 5). Secured to the cast iron table section l l, are right and left hand side gauges 20. For clearness of illustration, the left one only of such gauges is shown in the drawings.

The gauge mechanism consists of slots 2| formed in the table Il in which slide corner gauge clamps 22, oneonly of which is shown. Each side gauge 2t is secured to the top of its gauge clamp 22 by bolt 23. Threading into a boss on the lower face of each clamp 22 is the inner end of a shaft 24 having secured to its outer end a gauge adjusting knob 25. Each shaft 2d is mounted in a bearing or guide 26 (see Fig. 1) secured to the under side of table IS by screws 2l and prevented from longitudinal movement with respect to said table by adjusting set screw collar 28. By rotating the shaft 24, the gauge '20 may be positioned as desired.

Cutter slide I6 slides within slideway I5 and carries a cutting knife 28a (see Fig. 2'). At the lower end of cutter slide it is located a transverse kconnecting rod pin on which is mounted a link bearing 30 secured to the upper end of a connecting rod 3|.

Connecting rod 3| extends downwardly to a reduction rdriving unit 32 (see Figs. 1 and 2)r mounted on plate 33 which is secured to base l0. Mounted on and forming part of the reduction driving unit 32 and spaced apart from each other are crankshaft bearings 343 (see Fig. 3) in which is rotatably mounted a crankshaft 35. On the crank portion of the crankshaft 35 is rotatably mounted a connecting rod bearing 36 secured to the lower end of connecting rod 3|. n, On the crankshaft 35 adjacent the middle bearing 34 is rotatably mounted a worm gear 31 which meshes with and is driven by a worm 38. Worm 38 is` secured to a worm shaft 39 which is rotatably mounted in suitable bearings in a bracket il (see Fig. 1) forming part of the reduction unit 32 and in a bracket 42 secured to plate 33.

On worm shaft 39, adjacent bracket 42, lis sencured a combined iiywheel and b'elt pulley 5 2, which is in alignment with a driving pulley Ul` mounted on' the shaft of a continuously operated motor 45, secured to plate 33. Over pulleys 43 and 44 runs a V-belt 46 by means of which the iiywheel and belt pulleys are rotated. Worm 38 is preferably enclosed in a housing or cover 41.

Keyed to the crankshaft 35 is a clutch member 48 which contains an engaging pin 49 (see Fig. 3) held under tension by spring 49o and controlled by a tripping lever 56 which in turn is controlled by a foot pedal I. The foot pedal 5I is secured to a treadle shaft 52 rotatably mounted at one end in a bearing 53, and at its other end in a bearing formed in the right front leg i2. Secured to the treadle shaft 52 is a switch contact 54 which controls the contact of a micro-switch 55 secured to bracket 42.

On treadle shaft 52 is a spring anchor 51 to which is secured the lower end of a switch release spring 58, the upper end thereof being se? cured to the front shelf bracket 59.

The engaging pin 49 is slidable in the clutch member 4S parallel to the crankshaft 35, and has on the end adjacent the worm gear 31 a cylindrical reduced portion 49h (see Fig. 3) which is adapted to engage in a hole 31a in the hub of the worm gear 31. The engaging pin 49 is provided with a transverse groove 49o, in which fits the lower edge of the tripping lever 5B.

Also, the clutch member 48 is provided with a circumferential groove 48a of the same width as the groove 49o, in the engaging pin 49, and of a depth that will ensure the lower edge of the tripping lever 55 engaging with the engaging pin 49.

The engaging end of the tripping lever 5B is beveled, as indicated at Sila in Fig. 3,l and the travel of the reduced portion 49h of the engaging pin 49 is sufficient to permit locking the worm gear 31 to the clutch member 48, but not sufficient to move the transverse groove 49a of such engaging pin 49 completely out of register with the groove 48a in the clutch member 48. Therefore, the beveled end 56a of the triping lever 5f? will always be able to move the engaging pin 49 back to its normal or inoperative position, as shown in Fig. 3.

The tripping lever 5B is swivelly connected to the lower end of the plunger 50a of a solenoid 65 (see Fig. 4) and a spring 5|, mounted on the treadle shaft 52, constantly urges the free end of the tripping lever 5i! downwardly in the groove 48a. of the clutch member 48.

The switch 55 controls the electrical circuit through the solenoid 60 from any convenient electrical source. By energizing the solenoid 65, the trip lever 55 is raised out of engagement with clutch pin 4S, thereby releasing such pin 49 so that the spring tension applied to the pin 49 by the spring 49e will force such pin 49 to the left, as viewed in Fig. 3, and the reduced end 49a of such pin will engage in the hole 31a provided in the hub of the free running worm gear 31, thereby causing crankshaft 35 to rotate in unison with said worm gear.

By de-energizing the solenoid 5B, the clutch trip lever 59 is released and is forced into the groove 48a of the clutch member 48 by spring 6 I, Fig. 4.

As the clutch member 48 revolves, the beveled end 55u of the tripping lever 55 will move into the groove 45a in the engaging pin 49, thus forcing said pin to the right, as viewed in Fig. 3. withdrawing the reduced portion 45a thereof from the hole 31d in the hub of the worm gear 31, and freeing the said worm gear 31 from the clutch member 48, and stopping the rotation of the crankshaft S5 with the crank portion thereof in its uppermost position, as viewed in Fig. 3. There is thus caused a single stroke movement of the cutter slide l5, knife 23 and binder slide 63d.

The rotation of the crankshaft 35, through the connecting rod 3l, provides movement through one revolution of the crankshaft to the 'cutter slide i5, which carries the cutter knife 28a in one-half the crankshaft stroke downward to a position just passing the top edge of the stationary die i9 and then returning the knife to its uppermost position upon completion of the crankshaft revolution.

Located behind the cutting slide i6 and slidably mounted in the slideway i5@ formed in the cutter head slide i4, and free to slide therein is a member 63a carrying the binder 53. EX- tending downwardly from member 53a is a pair of rods 62 which are arranged parallel to each other and threaded at their lower ends to re ceive nuts S5 against which the lower ends of a pair of long coil springs 64 react.

Formed integral with the cutter head l5, and extending rearwardly therefrom, as shown in Fig. 2, are projections [6b against which the upper ends of coil springs 54 react and between which the rods 52 are located. The long springs 54 provide a Very substantial resilient operative connection between the cutter slide i6 and the slide 63a as will be understood.

In the preliminary movement of the cutter slide i5 downwardly the projections lh acting through the springs 54 will force the binder 53 downwardly and such binder will engage with and yieldingly hold the stack of paper to be out in advance of the engagement of the paper by the cutter 28a. The cutter will continue downwardly through the stack of paper and on completion of the cutting stroke both the cutter and the binder will move upwardly simultaneously.

At the upper end of the cutter slide i5 (see Fig. 2) is arranged a latch 51 which is manually set to render binder 53 inactive for the purpose of gaining access to the cutter knife 28a. For eX- ample, when it is desired to set or interchange knives, the latch S1 is swung into a notch (Fig. 2) provided in the back of the binder slide 63a and upon lowering of the cutter slide the binder slide remains in its upmost position. ipon lowering the cutter slide l5 the knife 28a will be exposed for removal, or for setting with respect to the die i 9, the die being snubbed in set position by back up screw 68 and locked in place by set screw in part 59. After setting the knife and die, the cutter slide I5 is returned to its upper position either by power or manual manipulation of the iiywheel 43 and the latch 61 withdrawn from the binder head notch.

Pivotally mounted at the upper end of the cutter slide I6 is a hood 10. This hood contains light socket 1| and light bulb l2. By swinging the hood 10 on its pivotal mounting, access to the locking device 61 is obtained.

Within the cutter slide i6 an opening is provided in the form (more or less) of a chute to receive cut chips as sheared by the cutter knife 28a. These chips are led downwardly and are deposited in a chip box 13 located within the confines of the frame work of the machine and removable at will.

The machine has been described in detail, and the terms knife and die have been used, as the machine is particuluarly adapted to cut round corners on piles of sheets of paper. However, this representsbut one application of my invention, and by modifications well within the scope of the invention the machine may be adapted to cut holes, either round or other shape, slots, etc., Withoutjfdeparting from the spirit and scope of the invention as defined by the appended claims.

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

1. Al trimming machine comprising a frame, a horizontal table on the frame including means for supporting a iixed cutting die, the frame having a vertical portion rearwardly of and extending upwardly beyond the table and cutting die, said vertical portion of the frame having a vertical guideway therein rearwardly of and open to its front faceand a second and relatively narrower vertical-.guideway vtherein rearwardly of and open to thefirst guideway, a cutter head mounted in one off said guideways and having a forwardly projecting portion adapted to carry a cutter for cooperating with the die, a slide mounted in the other guideway and carrying a work-engaging foot, and power operated means for moving the cutter head and slide downwardly in the guideways including means for advancing the foot resilientlyinto engagement with the work in advance of the engagement of the cutter with the Work. r

2. The machine defined in claim l in which the slide is disposed rearwardly of the cutter head and is provided with a forwardly and downwardly ex"l tending portion disposed over and forwardly of the top portion of the cutter head.

v,3. The machine dened in claim 1 in which the cutter head is disposed forwardly of the slide and is formedwith a downwardly extending chute for receivingand directing cutting chips downwardly teja;Y chamber beneath the table. .t

Themachine defined in claim 1 in which the last named means includes a power operated rod 5. A trimming machine comprising a frame, a horizontal table on the frame including means for supporting a fixed cutting die, a cutter head and a slide mounted for vertical movement on the frame, the cutter head being adapted to carry a cutter for cooperating with said die and the slide having a work-engaging foot, power operated means including a rod attached to and extendving downwardly from the cutter head, a rod attached to and extending downwardly from the slide parallel with the rst named rod, and a cornpression spring on the second named rod disposed between the cutter head and a stop on the bottom end of the second named rod for resiliently effecting downward movement of the slide from the cutter head.

6. A trimming machine comprising a frame, a `horizontal table on the frame including means vfor supporting a iixed cutting die, a cutter head and a slide mounted for vertical movement on the frame, the cutter head being adapted to carry acutter for cooperating with said die and the slide having a work-engaging foot, power operated means including a rod attached to and extending downwardly from the cutter head, a compression spring operative between the cutter head and slide for operating the slide resiliently downward from the cutter head, one-revolution clutch means for effecting downward movement of the rod and -cutter head, and a solenoid operated trip I mechanism for effecting operation of the clutc connected to and extending downwardly from the l I cutter head and two compression springs operativebetween the cutter head and slide and located at opposite sides of and parallel with the rod for .forcing the slide downwardly resiliently by the cutter head.

means.

ROY ABERLE.

REFERENCES CITED The following references are of record in the le of this patent: f

Hoskwith Qns- Sept. 1, 1936

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