US536458A - Box-machine - Google Patents

Description

(No Model.) 2 SheetsSheet 1.

W. S. DAVIS.

- BOX MACHINE.

No. 536,458. Patented Mar. 26, 1895. -1

.. ,l M i ll 1" I as co, vnovcmmo. WAsHINGTON. D. c.

(No Model.) 2 Shts-Sheet 2.

W. S. DAVIS. BOX MAGHINE.

No. 536,458. Patented Mar. 26, 1895.

UNITED STATES PATENT -OFFICE.

WALTER S. DAVIS, OF OONTOOCOOK, NElV HAMPSHIRE.

BOX-MACHINE.

SPECIFICATION forming part of Letters Batent No. 536,458, dated March 26, 1895.

Application filed July 9, 1894. Serial No. 517,006. (N0 model.)

To all whom it may concern:

Be it known that I, WALTER S. DAVIS, a citizen of the United States, residing at Oontoocook, in the county of Merrimac and State of New Hampshire, have invented certain new and useful Improvements in Box-Machines, which improvements are fully set forth and described in the following specification, reference being had to the accompanying two sheets of drawings.

This invention is in the class of box machines for which a patent numbered 352,304: was issued to me November 9, 1886, and my present purpose is to improve materially the mechanism for revolving the paste rolls of such machines. The corresponding mechanism of the machine of my said earlier patent, briefly described, consists of a belt or chain driven continuously from the initial, or some other suitable, shaft of the machine. This manner of driving the paste rolls keeps them in constant revolution and not only wears out the journals of the rolls, and their bearings, but also tends to churn the paste and cause it to foam, particularly in warm weather, and I have therefore found it desirable to revolve the paste rolls only while the box blanks are I being carried downward past said rolls; the

latter being at rest while the boxes are being formed and delivered by the other parts of the machine. Mypresent invention provides novel mechanism for thus controlling the movements of said paste rolls and it has the further advantage of causing the circumferences of the paste rolls to travel through space at exactly the same rate of speed as the blanks as the latter are forced downward by the vertically movable plunger.

In the annexed drawings, Figure 1 is a side elevation of the frame-work of a machine embodying my improvements and of suflicient parts of such a machine to illustrate clearly my present invention. For a detailed description of those parts not of necessity connected with the mechanism for driving the paste rolls, reference is made to my Patent No. 352,304 above referred to. Fig. 2 is a plan View of the shafts, cams, 650., located below line :c-.r of Fig. 1. Fig. 3 is a plan view of the upper portion of the machine, as illustrated in Fig. 1. Fig. 4 is an elevation of the upper portion of the machine, looking from rolls.

the rear end, and Fig. 5 is an enlarged, detached, view of the rack and pinion mechanism employed by me to revolve the paste Fig. 6 is an enlarged, plan, View of a portion of one of the paste rolls and its gear and Fig. 7 illustrates .a certain pawl and ratchet connection between said gear and the paste-roll shaft.

Referring to the drawings, the letters a and. b indicate the main supporting frames of the machine, said frames being connected and stiffened by girths c and cl.

' The letters e and e denote rods that are vertically movable in bearings at the top of the machine near, or secured to, the frames a-b, said rods having attached to their upper ends a cross-bar e which has depending from its central portion a rod e whose lower end carries a block, or form, f upon which the boxes are to be molded. The lower ends of rods 6 and e are connected with the free ends of lever-arms g whose other ends are hung on studs projecting from the two frames a,bi Said lever-arms have mounted thereon, near theirmiddle portion, rolls 9 that ride on cams h it carried by a shaft 71. j ournaled in the machine frame. (See Figs. 1 and 2.) Shaft it bears a gear h that meshes with and is driven by a similar gear t" on a shaft t','which latter has secured to one end a large gear 11 that is driven by a small gear on a shaft is which serves as the initial or driving shaft of the machine. Shaft k is provided with a pulley k that may be belted from any suitable counter, or line, shaft.

The described shafts and train of gearing provide a slow but steady rotary movement of l the cam-shaft h and said cams, at each revolution, slide the rods ee upward in their respective bearings and thus raise the form f to the position shown in Fig. 1 of the drawings. To aid the said form in its descent, springs connect the lower ends of rods ee' with some fixed part of the machine. .As here shown said springs are secured to bars m projecting downward from the main frames of the machine.

Near the upper part of the machine are plates n'n. upon which are mounted paste rolls WP-nbetween which the form f passes as it moves downward. The journal shafts of these paste rolls have loosely mounted thereon gears n n that carry pawls 00' which engage ratchet disks 0 -0 secured to the paste-roll shafts. (See Figs. 6 and 7.) Gear at meshes with and is driven by a rack m formed upon the upper edge of a bar m that is provided with grooves fitted to slide longitudinally on tongues nfi-n". As here illustrated said tongues are formed as integral parts of the plates n-n'.

Gear meshes with, and is driven by, a spur gear a that meshes with the rack m.

The lower edge of harm is formed with rack teeth m that mesh with a long pinion gear 13 that is suitably journaled and whose other end meshes with rack teeth 6 cut on the vertically movable rod c. When the machine is in operation the downward movement of said rack e causes the racks and gears of the described system to move in the respective directions indicated by arrows in Fig. 5, thus causing the paste rolls n n to revolve in the same direction, and in unison with, the descending form fand, as the several gears of the system are of the same size, the circumferences of said past e rolls m ust travel through space at the same speed as the said form. When the rods e-e and form f pass upward to allow another box blank to be fed under the form, the rack-bar m is returned to its normal position, as in Fig. 1, and its rod m then reverses the movement of the gears meshing therewith, as well as of the gear n which latter, by reason of the intermediate gear a revolves in a direction opposite to that of gear 91 When motion is thus reversed the pawls 0-0 ride idly over the teeth of their respective ratchet disks and, as a result, the paste rolls remain for the time stationary. It will thus be seen that fully one half of the Wear of the paste-roll journals is avoided by utilizing my present invention and also'that the paste rolls are driven positively and at a speed uniform with that of the vertically movable form f.

Having thus described my invention, I claim- 1. In combination with a movable box form having connected therewith a rack, as set forth, paste rolls located at opposite ends of said form, and rack and pinion mechanism substantially as described, connecting said rack and rolls,whereby the latter are revolved, for the purpose specified.

2. In combination with a movable box form having connected therewith a rack, paste rolls located at opposite ends of said form, each roll having a gear with pawl and ratchet mechanism, as set forth, to limit the direction of rotation of said rolls, and rack and pinion mechanism substantially as described, connecting said gears and movable rack.

3. In combination with a movable box form, and a rack connected therewith, paste rolls located at opposite ends of said form, each roll having a gear with pawl and ratchet attachment, substantially as set forth, and a train of rack and gear connections intermediate each of said paste-roll gears and the box-form rack, as described; one of said trains including an additional gear at to cause the paste-rolls to revolve in opposite directions.

WILLIAM N. AMBLER, WINFIELD S. SLooUM.

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