US1646918A - Scoring cutter - Google Patents

Description

oct. 25, 1927.

C. S. LENSTON y' Mari/figa C. S. LENSTON SCORING CUTTER Oct: 25,

Filed Nov. 8, 1926 2 Sh'eets-Sheet 2 Patented 257.

CHARLES S. LENSTGN, Gl VJURCESTER', MASSACHUSETTS, ASSGNOR TO HOBBS MANU- FACTURING: GGMANY, OF WGRCESTER, MASSACHUSETTS, A CORPORATION OF MASSACHUSETTS.

SCORING: CUTTER.

Application filed November 8, 1926. Serial No. 1463946.

This invention relates to a rotary cutter for use in connection with a roll for scoring card-board or other inaterial of a similar kind or for slitting or indenting itV as may be desired.

The principal Objects of the invention are to provide a mounting for the cutter in winch the cutter' will be bodily pivoted on an axis at such a height that the rise and fall of the cutter will not bring it materially outV of registration with its norinal position at the top of the sco ing roll; to provide a inounting for the cutter in winch side play is practically impossible, due to the construction itself; and to provide an iniproved way of adjusting the cutter up .and down about the pivot and securing it in its adjusted positions. f

Other objects and advantages of the invention will appear hereinafter. j

Reference is to be had to the accompanying drawings in which A Fig. l is a sectional view of the cutter bar and scoring roll in which the supporting means carried Yby the cutter bar is shown in side elevation;

Fig. 2 is a sectional view of the saine on the line 2-2 of Fig. 1;

Fig. 3 is a. transverse sectional view on the line 3-3 of Fig. 2;

Fig. 4l is an end view showing the left hand end in Fig. l; and

Fig. 5 is a central sectional view on the line 5-5 of Fig. 1. j

The cutter bar 10 and scoring roll 11 are of the usual construction well understood iu this art. rlhc cutter bar is provided with a dove-tailed projection 12 extending longitudinally and the body of the cutter supporting body 13 is secured on this dove-tail extension at any place along the cutter bar by ineans of a gib 1st and holding screw 15. This lines this body in position and it will be understood that as inany of these are placed along the cutter bar t ansversely as may be desired to produce the required number of grooves, slits or rows of indentations in the card-board C which constitutes the work.

Ordinarily the cutter 16 has been mounted on this body 13 about a` pivot near the upper right hand cornerJ7 as shown in Fig. l. rlfhe result of this was that when the cutter was raised or lowered its point of Contact with the scoring roll 11was shifted quite mate rially either to the right or left, thus result ing in a tendency to tilt the cardboard out of the horizontal and nialre imperfect work. @ne of the principal objects of this invention is to avoid this diiliculty and provide for causing the edge of the cutter always to engage the` surface of the roll, or the cardboard thereon, at practically the same high point, irrespective of wide! variations in ele vation.

For this purpose l provide a pivot stud 18 with its screw and check screw at the lower right hand corner of the body 13 and mount upon it a blade holder 19 and filling piece 17. rlhe position of the anis of this pivot stud 13 is a inatter of importance. lt is located half way between the level of the center of the cutter 1G when in its highest and lowest positions as adjusted in the body 13. ln this way the arc which the center of the cutter inales is bisected by a line drawn horizontally through the center of the pivot stud 13. Therefore the. position ofthe center of the cutter 1b' does not change greatly as it goes up and down. Its inaniinuni shift is reduced by one half on account of this location.

lt will be understood that there is a recess in the body 13 for receiving the cutter and the two parts of the holder 19. This is shown especially in Fig. 5 where the nieans for holding the cutter 16 in position is illustrated. |lhe cutter is provided with ball bearings 20, the inner race of" which is ca`r ried by a screw threaded stud 21. This stud has the square end of its head and the end of the screw fitting exactly in between the walls of the recess in the body 13 or at least just short enough thereof so as to enable it to be put into place. The screw threaded end of the stud 21 is provided with a nut 22 which also has a square end which can be screwed out just enough against the surface of the recess in the body 13 to forro a reasonably tight slidino' fit. Then the parts are introduced and tile blade holder cannot shift baclr and forth'in the' machined recess inV which it is located. l

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at the top to hold this screw in position and prevent its becoming loosened and insure thatl it will hold up that end of the blade holder. The screw 27 passes through a cylindrical stud 29 located in ay transverse cylindrical opening in the body 13. rIhere isa slit 30 extending across this opening from the rear of it to the edge of the body. This stud 29 is also vprovided with a slit 8l which extends almost allthe way across 1t parallel with the slot 30. There is a binding screwBZ for an obvious purpose. j

Supposing the binding screw 32 to` be loosened, the screw 27 is turned. to any desired position to adjust the cutter 16 up or down. Now when the right position is secured, the screw 32 is screwed dcwnV which tightens up the slit 30 and tightens the stud 29 in position, at the same time compressing that stud a little vwith reference to its slit 3l toitighten it Von the screw 27. It will be obvious therefore that adjustment is secured by one screwanvd the fastening of the cutter in its adjusted position is secured by the other. This constitutes a very simple arrangement for securing the adjustment of the cutter and it is locatedwith respect to the pivot 18 soft-hat the adjustment itself is' greater than the motion of the cutter. In other words, it 1sslightlymagnifiedso that the operator can work more finely. It will Y described, but what I do claim is l. In a scoring device or the like, the combination with a cutter bar and a scoring roll at a distance below it, of a body adjustable along the under side of the cutter bar and having a recess in its bottom, a blade holder mounted within the recess in said y body, Va circular cutter mounted on the blade holder to turn on a transverse axis, the blade holder being pivoted on an axis behind the cutter midwaybetween the center of the cutter` in its highest and lowest positions, and

means for adjusting the front end of a blade holder up anddown about said axis, whereby in all adjusted positions the cutter will engage the scoring roll substantially at its top. l

2. In a scoring device, the combination with a cutter bar, of a body mounted on the bottom thereof andhaving, a recess eXtending upwardly from' the bottom of said body, of a blade holder mounted for vertical adjustment Vwithin said recess, a stud passing through the blade holder and having means upon it for centering a circular cutter and having a nut on theother end adapted to be turned to a position in which the head of the bolt and the head of the nut will engage the sides of said recess to locate the cutter ir the body and prevent chattering and side p ay.

3. In a scoring device, the combination with a cutter bar and a body ladjustably mounted therealong on the bottom, of a blade holder pivoted to said body and located in a recess in the bottomthereof and having a circular blade mounted thereon to rotate freely, said blade holder havingan upwardly opening recess at the end opposite the pivot, a headed screw extending into said recess and rotatable therein, means for holding the head of the screw in the recess but allowing it to turn therein,` and means for clamping said screw in adjusted positions. l

t. In a scoring device, the combination with a cutter bar anda body adjustably mounted therealong on the bottom, of a blade holder pivoted to said body and located in a recess in the bottom thereof and having a circular blade mounted thereonto rotate freely, said blade holder having an l' upwardly opening recess at the end opposite the pivot, a screw having a head extending into said recess Y and rotatable therein, a transversely slit stud located transversely in said body and having a perforation for receiving said screw freely therethrough, the body having a slitV parallel with the slit in the stud extending through the opening` in which the stud is located, and means for tightening up the slit in. the body to clamp the body against the stud and the stud against the screw. f i y 5. In a scoring device,V the combination with a body, of a blade holder pivoted to said body and having a circular blade mounted thereon to rotate freely, said blade holder having an upwardly opening recessv to clamp the screw.

6. In a scc-ring device, the combination of asupporting body' having a recess extending upwardly fron'k the bottom, of a blade nolder pivoted at the rear within said recess, a stud passing through the blade holder and having means upon it for centering a circular cutter and having a nut on the other end adapted to be turned to a position in which the head of the bolt and the head of the nut Will engage the sides' of said recess to prevent chattering and side play, and means extending down from above into said recess for adjusting said body about said pivot. In testimony whereof I have hereunto aiixed my signature.

CHARLES S. LENSTON.

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