US837353A - Cutting rolls and knives for box-making machines. - Google Patents

Description

I PATENTED 0M4, 1906. E. G; STAUDB. 1) KNIVES FOR BOX MAKING MACHINES. APPLICATION I'ILED DEO.12,'1902.

I" N X V I de CUTTING ROLLS AN UNITED STATE PATENT @FFICE.

CUTTING ROLLS AND KNIVES FOR- BOX-MAWNG. MACHINES.

Specification of Letters Patent.

Patented. Dec. 4, 1906.

A plication filed December 12.1902. Serial No. 134,903.

To all whom, it Duty (2071420771,.-

Be it known that I, EDWIN G. STAUDE, of Minneapolis, Hennepin county, Minnesota,

have invented certain new and useful lming flexible boxes, and particularly to the cutting rolls and knives therefor.

The object of the invention is to. provide blank-cutting means for use in connection with the machine shown and described in Letters Patent of the United States -issued- December 9, 1902, No. 7l5,620,-wherein the blanks travel in one direction from the rolls through the folding devices to the discharge end of the machine.

A further object is to provide cuttingknives that will cut and sever the blanks of light or heavy stock without danger of tearing or otherwise mutilating it.

Other ob'ects of the invention will appear from the following detailed description.

The invention consists generally in revolv ing coacting rolls having slitting and sever ing knivesarranged thereon in groups, the groups on one roll being opposite corresponding spaces on the other roll and coinciding therewith as the rolls revolve.

Further, the invention consists in various constructions and combinations, all as hereinafter described, and particularly pointed out in the claims.

In the accompanying drawings, forming part of this specification, Figure 1 is a perspective view of revolv'rig cutting-rolls, show- 'ing the recesses thereinand knives alternat- Fig. 2 is a transverse section.

ing therewith. through the rolls and knives.

In the drawings, 2 represents rolls of the same diameter arranged one above the other and having journals 3, supported in suitable hearings on the frame of the machine. The rolls travel in opposite directions, as indicated b the arrows, to feed the stock hetwe'en tiem and are provided with gears 4, operated from a suitable source of power.

In the periphery of each roll, extending lengthwise thereofil arrange scoring-knives or cutters 5 and severing-knives o. I also provide transverse cutting or slitting knives 7, arranged substantially at right angles to the sevcring-knives and conforming to the rounded surface of the roll. The groups of knives are arranged upon opposite sides of an imaginary linerunning lengthwise of the rolls, and alternating with said groups I provide recesses or depressions 8 in the peripheries, the recesses of one roll being opposite and adapted to receive the corresponding group of knives on the other roll and each group of knives being ada ted when it enters a recess to coact with tie knives of the abutting groups, making a shear cut therewith to slit and sever the blanks. l have arranged one row of groups of knives and one of recesses on each roll, so that a blank will be slit and severed with each revolution, and I arrange them zigzag, for I have found that where the knives are arranged in groups close together and operate in quick succession upon the stock it all the knives were arranged in one straightrow and the recesses in another the tongues formed in the stock would all be forced .1p or down, and as the slitting-knives would engage the stock before those that sever it tire tongues would be pressed so far one way or the other that it would be necessary to have severing-knives of greater depth than the others, and even then there would begreat danger of tearing or otherwise mutilating the stock by the action of the slitting-knives pressing the tongues in one direction before the other knives could perform their function. Furthermore, it would be impracticable to have the severingknives of greater depth than the others 1n rolls of small diameter, owing to the fact that the outside or cutting edges of the knives would project too far above the pitch-line of the rolls and the counting knives would not meet to make a clean shear cut, but would have a rolling motion similar to the addendum of an ordinary gear-tooth.

'lo obviate the necessity of having knives of (lill'crent depth and the danger of tearing the stock, I armugc the recesses up "r positc sides of an imaginary line, as described, alternating with the groups of severing and slitting knives, and with this arrangement the stock is pressed u") to form one tongue andv in the opposite sary to have cutting edges of sullicient depth on all the knives to pass th: Jugh the stock.

At the ends of the rolls 1 )rovide knives 9 upon oppositosides of the longitudinal line cooperating with recesses 10 to cut out the waste iece 1-1 in the sides of the blanks to form the short tongue 12 thereon. It sometimes happens that this waste piece will ircction to form the .;other, as shop. in Fig. 1, and it is only necesprovide a knocker-arm 13, mounted -on a shaft 14, that carries a gear 15, meshing with the gear 4. The gear 15 will have the same number of teeth as the gear lanks pass by.

claim as my inv ention a 1. -The combination with a roll, of severing and slitting knives arranged in sets thereon, the severing-knives extending lengthwise of the roll and the slitting-knives transversely thereof, and the slitting-knives of the contiguous sets beingon opposite sides of the severing-knives of those sets, substantially as described.

2. The combination with a roll, of severing and slitting knives arranged in sets or groups thereon, the severing knives extending lengthwise of the roll substantially in line with one another and the slitting-knives transversely on the roll, and the slittingknives of contiguous sets being located on opposite sides of the severing-knives of those sets, substantially as described. e combination with the revolving rolls, of slitting or severing knives arranged in sets or groups thereon, the severing-knives extending'lengthwise of the ting-knives transversely thereof, and there being blank of the rolls alternating with the sets of knives thereon, substantially as described.

4. The combination, with the rolls having eripheral recesses, of severing and slitting linives mounted on said rolls and alternating with said recesses, the knives of one roll being opposite the corresponding recesses in the other roll and having a shear cut with the contiguous knives, for the purpose specified;

5. The combination, with the revolving rolls having peripheral recesses arranged zig zag uponop osite sides of a straight line parallel with t e axis thereof, of severing and slitting knives 6 and 7 fitting within sockets in the periphery of said rolls substantially at right angles to each other and in groups alternating with said recesses, each group on one roll being op uosite a corresponding recess in the other roll and adapted to enter the rolls and the slitspaces provided on the surfaces l l r 1 shear cut with the knives the rolls and alternating with said recesses,

whereby a group of knives in one rollwill be opposite a recess in the other roll, comparatively short severing-knives 9 provided near one end of each roll in the opposite roll, substantially as'describe 7. The combination with a roll, of severing and slitting knives arranged in sets thereon,

and adapted to enter a the severing-knives extending lengthwise of n the middle portion of the rolls and the slittingknives transversely thereof, the slittingknives of contiguous sets bein on opposite sides of the severing-knives of those sets, and there being comparatively short severingknives 9 at one end of the roll extending lengthwise thereof, and transverse slittingknives connecting them, substantially as described.

8. The combination with the revolving rolls havin peripheral depressions, of the longitudina ly-arranged severing-knives and the transverse]y-arranged slitting-knives alternating on the surface of the rolls with said depressions and the comparatively short severing-knives 9 )rovided at the ends of said rolls and the sl inner ends of said knives 9, substantially as described.

9. The combination, with the revolving l rolls having peri )heral depressions, of sever ing and slitting knives alternating With said depressions in the surfaces'of the rolls whereby up and down cuts will he alternately made in the stock, substantially as described.

In witness whereof I have hereunto set my hand this 9th day of December, 1902.

EDWIN G, STAUDE.

/ corresponding recess i I l In presence of M. 0. N OONAN, C. G. Hanson.

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