US636068A - Preliminary feed mechanism for box-blank material. - Google Patents

Description

No. 636,068. Patented Oct. 3|, I899.

F. P. HOSBACK.

PRELIMINARY FEED MECHANISM FOR BUX BLANK MATERIAL.

(Application filed Apr. 24, 1899.) 0 M em 3 Sheets-Sheet I.

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No. 636,068. Patented Oct. 3|, I899.

' F. P. ROSBACK.

PRELIMINARY FEED MECHANISM FOR BOX BLANK MATERIAL.

(A lication filed A r. 24 1899.\

(No lilo ell) 3 sheetseeee t2 gi mm 3 M No. 636,068. Patented Oct. 3|, I899.

F. P. ROSBACK. PRELIMINARY FEED MECHANISM FOR BOX BLANK MATERIAL.

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PRELIMINARY FEED MECHANISM FOR BOX-BLANK MATERIAL.

SPECIFICATION forming part of Letters Ratent No. 636,068, dated October 31, 1899.

. Application filed April 24,1899. Serial No. 714,243. (No model.)

provement in Preliminary Feed Mechanism for Box-Blank Material, of which the following is a specification.

My invention relates to improvements in machines for making blanks for what are known as wire-bound boxes, the machine being of the class forming the subject of Letters Patent of the United States No. 614,348, granted to me November 15, 1898, and it relates more especially to improvements in what was described in said patent as the preliminary feed mechanism.

In the operation of the machine blank material consisting of wooden cleats of the desired length with strips or sheets of wood or veneer loosely imposed thereon is placed, by hand or otherwise, in guides in the machine and then advanced by the said preliminary feed mechanism to its initial position at the tacking devices, (which may be staple forming and driving devices,) which stitch 0r fasten the parts of the blank material together.

The main feed mechanism, which operates in correlation with the tacking devices to ad- Vance the blank material through the machine while the stitching is being performed, is actuated from the main drive-shaft of the machine, while the preliminary feed mechanism is actuated from another drive-pulley merely to engage and move the blank material initially to position it with relation to the tacking devices or stitchers, so that the first staples or nails will be driven at the proper distance from the end of the blank. The preliminary feed mechanism is then disengaged or thrown out of operation and the further advance of the blank material takes place under the action of the main feed.

As my present invention deals only with the preliminary feed mechanism,only so much of the entire machine is shown in the drawings as is thought necessary to clearly illustrate the construction and operation of those parts which constitute-my present invention.

Referring to the drawings, Figure 1 is a broken plan'section taken on line 1 of Fig.

2 and showing but one staple forming and driving device or stitcher, although two or more of the same may be employed; Fig. 2, an enlarged broken side elevation of one end portion of the machine; Fig. 3, an enlarged section taken, for purposes of illustration, on the lines 3 3 of Fig. 1, corresponding with the irregular line 3 in Fig. 2; and Figs. 4 and 5,

. scribed in application Serial No. 704,4.78, filed by me February 4, 1899, for a Feed device for box-blank material.

O is a swinging frame, and O a staple forming and driving device or s'titcher. The parts O and O are fully shown and described in my aforesaid Letters Patent, and it will suffice, in the present connection, to state that they are shown in the position at which staples are driven.

V D is a stub shaft or pin fastened at one end in the side cheek A and supported atits outer end by a bracket D. Journaled on the pin D is a sleeve E, provided at its center with a cam-faced arm E, extending in one direction, and provided at opposite ends with arms E E which at their free ends form bearings for a shaft F. The shaft F carries the preliminary feed driving pulley F and a frictiondrum F the pulley being belted to a line'- shaft or other driving power to rotate constantly with the shaft F and drum F On the shaft B is a friction pulley B to be engaged and rotated by the friction-drum F; but the latter is held normally out of said engagement byaspringFiwhichtends normally to raise the shaft F and attendant-parts.

G is a lever having a long arm G and a short arm G the latter being formed with a segmental rack t. The lever G carries a fulcrum-shaft G passing through and j ournaled in abearing s in the cheek A. On the lever,

in the position shown, is an antifriction-wheel G which engages the cam-face of the arm E. A spring G tends normally to draw the lever G in the direction of releasing the arm E, so that the drum F will disengage the friction-pulley 13" under the lifting effort of the spring F Extending through the cheek A and journa led in a bearing therein is a rock-shaft I,carrying at its outer end a pawl l to engage the rackt and carrying at its inner end a crankarm 1 having an elongated slot 1 K is a rod passing loosely through bearings 1-1" on the cross-bars A A respectively. On the rod K are collars q q, and surrounding the rod and confined between the collar 1 thereon and the bearing ris a spring 1 The spring 1 tends to press the rod in the direction to the right in Fig. 1, whereby the collar q bears against the bearing 7', while the collar g, by engaging the hearing 0', limits movement of the rod in the direction to the left in Fig. 1. On the rod K, between its ends, is an adjustable stop or shoulder piece K, which may be slid along the rod and fastened in any adjusted position. Toward the end of the rod and fastened thereto is a laterallyextending arm or finger K which at its free end extends into the slot 1 of the arm 1 On the shaft G which carrics the lever G, is a shaft-extension G forming, to all intents and purposes, an integral part of the shaft G Fastened upon the extension G is a crankarm G On the shaft K is a crank-arm K pivotally connected, by means of a link G with the end of the crank G A cord X, fastened to the free end of the lever G, extends to the front of the machine, where the operator stands.

The blank material Y is inserted from the front end of the machine at B into the guides A while the machine is at rest or, at any rate, while the preliminary feed mechanism is out of operation, and the object of the preliminary feed mechanism is to move the drive chains or belts B so that the bar or pusher B, which travels an endless course, will engage the rear ends of the blank material and push the latter forward, so that the forward edge thereof will come to the dotted line 2; in Fig. 1. The length of the blank material being determined the finger or shoulder piece K is adjusted along the rod K so that it will extend into the path of the pusher-bar B and be engaged thereby as the forward end of the blank material approaches the dotted line .2. To start the preliminary feed, the operator, after having inserted the blank material, draws upon the cord X to swing the lever G to the position shown in Fig. 2, whereby its wheel G4 presses the cam-arm E upward to force the friction-drum F against the friction-pulley B The parts are held in this position by the engagement of the pawl I with the rack t. When the parts are thus engaged, the constantly-rotatingbelt-pulley F,through the medium of the friction-wheels F B rotates the shaft B and moves the feed-belts B until the pusher B operating as a stop on the feed-belt, engages the shoulder-piece K on the rod K. Then the stop or pusher B strikes the shoulder-piece K, it causes the rod K to be pushed against the resistance of the spring (1 so that its arm or finger K turns the crank 1 and shaft I to disengage the pawl I from the rack If and release the lever G. \Vhen the lever is thus released, it is swung to the right in Fig. 2 by the spring G to lower the wheel G along the cam-arm E, permitting the spring F to raise the shaft I, pulley F, and drum F to release the engagement of the latter with the friction-pulley 13 This disengagement causes the shaft B and feed-belts to stop just as the blank reaches the dotted line .2. The machine may then be started in a manner described in my aforesaid Letters Patent, and the first staples or other fasteners will be driven at the right distance from the forward edge of the blank.

The turning of the lever G under the action of the spring (l turns the crank Gr so that it swings downward and through the me; din m of the link G8 swings down the crankarm K to turn the rod K on its axis and lift the end of the shoulder-piece K out of the path of the stop or pusher B \Vhen the op e'rator pulls the cord X to start the preliminary feed, the shoulder-piece K, through the same connections, is lowered into the path of the stop B When the machine is started to drive the fasteners, the blank is fed forward by the regular main food mechanismthatis to say, by the rotation of a shaft M, carrying a sprocket-wheel M, which is geared by a chain M to a sprocket-pinion on the shaft B. The sprocket-wheel M is loose upon the shaft M and has inner circumferential ratchet-teeth M Keyed to the shaft M is an arm M carrying a spring-pawl M engaging the ratchetteeth. This construction causes rotation of the shaft M to drive the shaft 13; but when the latter is driven by the preliminary feed mechanism the ratchet slides over the pawl without affecting the shaft M.

While I prefer to construct my improvements as shown and described, they may be variously modified,according to requirements, without departing from the spirit of my invention as defined by the claims.

What I claim as new, and desire to secure by Letters Patent, is-

1. The combination with the feed-belt, and regular main feed mechanism therefor, of preliminary feed mechanism operating without interference from the main feed mechan ism to drive the belt comprising in combination a drive-shaft, driving-gear between said shaft and the belt, a stop projecting from and movable with the belt, and disengaging means for said gear in the path of said stop, said stop and disengaging means being relatively adjustable, substantially as and for the purpose set forth.

2. The combination with the feed-belt and regular main feed mechanism therefor, of preliminary feed mechanism, operating with out interference from the main feed mechanism to drive the belt, comprising in combination a drive-shaft, driving-gear between said shaft and the belt, a stop projecting from and movable with the belt, and adjustable disengaging means for said gear in thepath of said stop, substantially as and for the purpose set forth.

3. The combination with thevfeed-belt, preliminary feed drive -shaft, driving -gear between said shaft and belt, of a stop carried by the belt, gear-disengaging mechanism, a lon gi tudinallymovable and laterally-turning shoulder-piece connected with said gear-disengaging mechanism and extending into the path of said stop to be engaged and moved thereby to operate the gear-disengaging mechanism, and means for turning the shoulder- 4. The combination with the feed-belt, preliminary feed driveshaft and drivinggear between said shaft and belt, of a stop carried by the belt, gear-disengaging mechanism, a longitudinally and axially movable rod connected with said gear-disengaging mechanism, and a shoulder-piece on said rod to extend into the path of said stop and operate substantially as and for the purpose set forth.

5. The combination with the feed-belt, preliminary feed drive-shaft and driving -gear between said shaft and belt, of a stop carried by the belt, gear-disengaging mechanism, a longitudinally and axially movable rod connected with said gear-disengaging mechanism, and an adjustable shoulder-piece on said rod to extend into the path of said stop and operate substantially as and for the purpose set forth.

FREDERICK P. ROSBAOK.

In presence of- M. J. FROST, R. TrSPENoER.

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