US611431A

US611431A - Plunger for paper-box machines

Info

Publication number: US611431A
Authority: US
Publication date: 1898-09-27
Anticipated expiration: 1915-09-27

Description

Patented Sept.'27, |898.`

C. M. HULCOMB.

PLUNGER FOR PAPER BOX MACHINES.

(Apphcatxon led July 30 1897 (No Model.)

llnrrnn STATES CHARLES BLAHOLOOMB, OF NEV YORK, N. Y., ASSIGNOR TO ALFRED BIRNIE,

OF SPRINGFIELD, MASSACHUSETTS.

PLUNGER` FOR PAPER-BOX MACHINES.

SPECIFICATION forming part of Letters Patent No. 61 1,431,`dated September 27, 1898..

Application filed July 30,1897. Serial No. 646,484. (No model.)

To @ZZ whom it may concern.-

Beit known that I, CHARLES M. HOLOOMB, a citizen of the United States, and aresident of New York, (Brooklym) in the county of Kings and State of New York, have invented certain new and useful Improvements in Ex` tensible and Oontractible Former-Plungers for Paper-Box Machines, of which the follow ing is a specification.

This invention relates lto improvements in folding, forming, or creasing plungers for machinery for making paper boxes, envelops, &c., but more particularly paper boxes, and especially pertains to folding-plungers which are adjustable as` to size, so that a single plunger may be employed for the production of paper boxes of varying lengths and widths within a given reasonable range.

The invention-consists in a folding-plunger comprising parts and arrangements all substanfially as will hereinafter fully appear, and be set forth in the claims. f

Reference is to be had to the accompanying drawings, in which-4 Figure 1 is a plan view of the improved adjustable plunger. Fig. 2 is in part aside view and` in part a vertical sectional view of the plunger as taken on the line l2 2, Fig. 1. Fig. 3 is an end view of the plunger. Fig. 4 is a cross-sectional view of the plunger as taken vertically on the planes indicated by the line 4 4, Fig. 1. Fig. 5 is a partial end View of the plunger, showing a supplemental equipment therefor, hereinafter described.

The sectionahextensible, and contractible.

plunger comprises four blocks or sections A A, each having bottom 10, end face 12, and side face 13, squared to each other and arranged and held with their bottoms 10 all in acommon horizontal plane and their side and end faces coincident with vand common to the planes corresponding to the sides of a true rectangle, the blocks being separated cross- Wise and endwise from each other and firmly held in such separation by the means to be described, sothat for the time being lto all intents and purposes the plunger when in use is as efficient and stable as if constructed solid and non-adjustable.

Each of the blocks A is provided at its upper and lower portions with the angular extension 14, inwardly longitudinally extend ing, and the blocks about centrally of vthese extensions 14 are drilled and tapped, as indicated in Figs. 1 and 2, and receive the screw engagement therein of the threads of the screw-shafts B,which are right and left hand threads, so that the turning of the shaft in one direc-tion will cause the end blocks to be distended, while the turning of the shaft in the other direction will insure their assuming approached relations. As here shown for each and both of the side pairs of the blocks or sections AA thcre are two of these screw-shafts B, arranged longitudinally in parallelism and entering the screw-sockets in the upper and lower portions of both of the blocks at one side of the plunger.

Each screw-shaft B has integrally formed at its middle the gear-wheel O with the hubs a a at its opposite faces, and an opposing pair of flat plates b b, having circular apertures 1G, are iitted about and supported upon the said hubs a aand `in turn serve to support the hubs or gudgeons of the intermediate gear-Wheels CZ d.

One of the gudgeons orjournal-hubs for the intermediate gear-wheels d has thereon a projection d2, of polygonal form, which is also perforated, whereby it may be either turned by a wrench or a spanner` or suitably otherwise, so as to impart simultaneously a rotation to both .of the double or right and left hand screws,which engage in upper and lower threaded sockets to be moved strictly horizontal toward and from each other and preventing any tendency of the one to be canted in such a way that its end 12 would not be perpendicular.

jj representlock-nuts screwing on the screwA shafts and setting up against the inner ends of the sections A.

A bar or dowel Dis provided for each of the blocks A at one side of the plunger, the same projecting horizontally crosswisefand entering a socket 17 therefor in the correspondingly-opposing block.` i

The sockets17 17 in the opposing pairs of the blocks exactly match, so thatwhatever maybe the distention or contraction ofone side IOO pair of the plunger-blocks A A the opposing pair of blocks may readily be brought to have exactly the same distention or contraction by reason of the engagement of the dowels in the sockets therefor in all of the four blocks. The opposite side pair of blocks may be adj usted crosswise relative to each other by sliding them on the dowels, the set-screws f having been loosened preparatory to effecting the adjustment and tightened up again to connect the blocks firmly with the dowels after the lateral adjustment has been accomplished. The dowels also insure that the blocks A A at one side must stand exactly parallel with the pair of blocks at the other side of the plunger.

In effecting the adjustment of the plunger longitudinally the dowel between one en d pair of the blocks is removed. The adjustment of one side pair of the blocks is effected by operating the right and left hand screw for said side pair. Then the right and left hand screw for the other side pair of the blocks is operated, so that these blocks are opposite those of the first adjusted side pair, and the dowel is replaced and secured by the set-screws therefor. Of course in effectingthe transverse adjustments one set-screw for each of the dowels must be loosened.

This plunger is supported on the plungershaft F by the horizontal bar G, which ranges over the sectional plunger diagonally, substantially as shown in Fig. l, the opposite end portions of this bar having the slots g,through which the confining-bolts h are passed, their screw-Shanks entering the tops of the diagonally-opposing blocks A A, while their heads have a clamping bind upon the top vof the bar G. Vhen the plunger is to be adjusted, these confining-bolts are loosened, whereupon both longitudinal and transverse adjustments may be accomplished without interference by the bar.

The plunger herein described is especially available in paper-box machines of the description shown and described in Letters Patent of the United States, dated May 28, 1894, No. 519,531, wherein the most forcible setting pressure is brought against the ends of the folder and former plunger, and it will be observed that this pressure is ably resisted by the threads of the screw-shafts B, which receive the end thrust imparted against the ends of the blocks or sections A A.

inasmuch as it is desired to so construct the plunger that the opposite side pairs of blocks may be for narrow boxes brought close together, it will be observed that the gears on and between the pairs of right and left hand threaded screw-shafts and the supports b b for the intermediate ones of these gears occupy a width no greater than the thickness transversely of the blocks, as will be especially apparent on reference to Figs. l and 4, and because it is desirable to acquire the most even and uniform operation by the upper and lower pairs of screws-shafts caused to rotate in a reversed direction from the lower screws the upper right and left hand screws B B are arranged with their threads reversed from the threads of the lower screws, so that both screws will operate to move the upper and lower portions of each block at one time in the same direction.

Inasmuch as this plunger may be utilized in paper-box or analogous machines in which the pressure against the blank and end of the plunger is somewhat within the corner adjoining the lateral side of the plunger, I find it occasionally advantageous to provide a removable and adjustable plate M, which traverses the distance between the end pair of sections A, which is detachably confined by the set-screws n, which are passed through the countersunk slots m in the plate and into the sections A.

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

l. An eXtensible and contractible formerplunger consisting of four blocks or sections, the front and rear side pairs being respectively screw-engaged by right and left hand screw-shafts, the blocks at one side having transversely-extending dowels which play through sockets' therefor which are provided in the opposing pair of said blocks, and set-screws for confining said blocks and dowels.

2. An extensible and contractible folderplunger comprising four blocks or sections arranged at the corners of a rectangle, means whereby the opposite end pairs are supported and adjustably confined in suitably approached or distended relation, means whereby the opposite side pairs of the blocks are supported and adjustably confined in approached or distended relations, the plungershaft having the bar G, the ends of which are longitudinally slotted and which ranges over and between diagonally-opposing pairs of said blocks and the headed bolts 7L h adj ustably confining said bar G upon said diagonally Opposite blocks, substantially as described.

3. An extensible and contractible folderplunger comprising opposite end sections, upper and lower pairs of right and left hand screw-shafts engaging said sections, means for turning one of said screw-shafts and means whereby, from the rotation thereof, the other of said shafts will be also turned, for the pur-` pose set forth.

4c. An extensible and contractible folder- IOO IIO

plunger comprising four sections arranged at the corners of a rectangle, the opposite side pairs thereof having combined therewith screw-shafts in pairs, the turning of which draw or distend the said screw-united side pairs of the sections, means whereby one side pair of the sections is adj ustably guided transversely relative to and connected with the other side pair, and means whereby, from the rotation of the one screw-shaft of each side pair of the sections, the other screw-shaft for said side pair will also be rotated, for the purposes set forth.

5. An extensible and contractible folderplunger comprising opposite end sections, upper and lower pairs of right and left hand screw-shafts, screw engaging said sections, each having at its middle a gear-wheel, supports mounted on said screw-shafts adjacent the gear-wheels and supporting intermediate gearing and means for turning one of the y gears, for the purpose set forth.

turn it, substantially as and for the purposes set forth.

7. Ina contractible and extensible formerplunger in combination, the four blocks or sections A A having the longitudinal screwsockets in pairs, the transverse horizontal sockets 17, and the dowels D engaging therein, the set-screws f for said dowels, the upper and lower pairs of right and left hand screwshafts foreach side pair of said blocks which screw-engage in said threaded sockets therefor and which shafts have at their middle portions the gear-wheels C C and the hubs a, n the plates b which are apertured and supported upon said hubs a and on which are supported the intermediate gear-wheels d CZ, the lock-nuts jj on said screw-shaft adapted to be set against the inner end faces of the said blocks, the plunger-shaft F havingthe bar G horizontally ranging between and over the diagonally opposite pairs of the blocks and having their ends longitudinally slotted, and the headed bolts h h adjustablyconning said blocks to said bar, substantially as described.

In testimony that I claim the foregoing as my invention I have signed my name, in presence of two witnesses, this 13th day of July, 1897.

CHARLES M. HOLCOMB,

Witnesses: i

WM. S. BELLows,

M. A. CAMPBELL.