US1163305A - Paper-gripper for job-presses. - Google Patents

Description

H. B. ANWAY.

PAPER GRIPPER FOR JOB PRESSES.

APPLICATION FILED FEB. 27. 1915.

1,163,305; Patented Dec. 7, 1915.

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rrnp srA HARRY BFANWAY, or CHICAGQILLINOIS;

PAPE -German r03 JoB-rnEssEs.

messes;

specification. I

This invention relates in general to printing presses, more particularly job presses, and has especial reference to the paper grippers by means of which the printed sheets of paper are withdrawn from the printing bedupon' return movement of the platen. Two general types of grippers have been employed on presses of this character prior to my present invention. One type consisted merely of straight bars or arms extending upwardly in front of the platen, and

in practice strings or rubber bands are stretched acrossfrom one arm to the other I 1n posltion to engage the paper sheets as the arms are retracted from the type-bed, the strings or rubber bands serving to withdraw the paper from the type; Manifestly, however, these makeshifts are unsatisfactory for the reason that the strings and rubher hands are continually breaking, and furthermore, they are easily displaced and get between the platen and the type, thereby spoiling the work. The second type of gripper comprises similar upright arms provided at their upper ends with inwardly extending fingers rigidly mounted on the arms. The arms themselves are mounted for longitudinal adjustment on the gripper bar to bring the fingers to the required height. When the arms are in lowered position their lower ends extend below the pivoted gripper bar and'should the press be started while,

the arms were tilted forwardly their lower ends would be disposed in the path of the ink rollers or operating mechanism with the result that the arms or some of the machinery would be broken.

One of the primary objects of my present invention is to provide grippers for a job press having fingers which engage the paper so mounted upon the gripper arms that they may be adjusted up and down thereon and securely fastened in any desired adjusted position.

Another object is to provide grippers which will not extend below the gripper bar so as to become involved with the machinery of the press and which can be readily ap- Specification of Letters Patent.

Patented Dec. 7, 1915.

Application filed February 27, 1915. SeriaINO. 10,916.

plied to the presses now on the market and which will be so constructed that the height of'the gripping fingers can be easily and quickly adjusted.

A further object is to provide grippers which willbe simplein construction, cheap to manufacture, and which will be of strong and durable construction.

To facilitate an understanding of my invention I have shown on the accompanying drawings one preferred embodiment thereof, from an inspection of which, when considered in connection with the following scription, the construction and operationof my invention will be readily understood.

lleferringto the drawings,Figure 1 is a side elevation of a job press equipped with my invention Fig. 2 is a face view of the platen and grippers; is a sectional view on the line 3-3 of Fig. 2; Fig. dis a fragmentary view. looking at the front face of the upper end of one of my improved grippers, and Fig. 5 is a transverse sectional View on the line 5-5 of Fig. l. On the drawings reference character 6 indicates the frame of the machine upon which the usual operating mechanism, including the type-bed 7 and the platen 8, are mounted The mechanism for oscillating the type-bed and the'platen'and for operating the inking mechanism is so familiar'to those skilled'in the art that a detailed description thereof is believed to be unneces sary in the present case, particularly in View of the fact that myinven tion is applicableto any of the standard presses now on the market in which these various mechanisms differ from eachother to some degree in theirdetails of construction.

The platen 8 is provided at its lower edge with the downwardly and rearwardly eX- tending arms 9 between which the-gripper bar 11 is pivotally mounted upon the pintles 12. The gripper is equipped with an arm 13 carrying the roller 1-1 adapted to engage the link 15 against which it is held by the coil-spring 16 in the usual manner, so that when the platen is in the position shown in Fig. 1 the gripper arms 17 assume sub stantially the position shown, and when the platen is moved to printing position the gripper arms lie flat against the face thereof in the customary manner. Each gripper arm 17 is provided at its lower end with an inturned flange 18 adapted to fit in a correspending groove 19 formed in the lower edge of the gripper bar 11, and the arms are secured to the bar by means of bolts 21 passed through slots 22 in the gripper bar and through slots 23 in the gripper arms, nuts 24 threaded on the bolts being employed to clamp the arms in position. It will be obvious that by loosening the nuts the arms may be adjusted back and forth longitudinally of the gripper bar to any desired position. Each arm is provided with a longitudinally extending slot 25 and the front face of each bar is formed to provide grooves 26 at each side of the slot 25 adapted to receive the flat head 27 of a bolt 28 which eX- tends rearwardly through the slot 25. It will be observed that the grooves 26 permit the outer face of the bolt-head 27 to lie flush with the front face of the gripper-arm. The belt 28 serves to secure in position upon the arm a paper-gripping finger 29 comprising a base 31 stamped into channel-shape to embrace and loosely fit the arm 17 with the front face of the finger extending substantially flush with the front face of the arm. The base of the finger is provided with an opening through which the bolt 28 is passed and the finger is clamped in position on the arm by means of a thumb-nut 32 threaded 0n the bolt. Thefingers 29 extend laterally inward from their respective arms 17 transversely of the platen 8, and by loosening the nuts 32 the fingers may be adjusted longitudinally of the arms to any desired position so that they will engage the sheets of paper placed upon the platen.

In Fig. 2 a printed sheet is shown and designated by reference character 33, the platen being equipped with the usual guides 34 to determine the position of the sheet on the platen. One of the fingers 29 is shown as engaging the upper portion of the sheet while the other is positioned to engage the lower portion. Manifestly, however, the fingers may be adjusted to any position in which they will engage the paper without being disposed over the face of the type carried by the bed 7. When the platen is moved against the type-bed the grippers are moved rearwardly with the platen, the front face of the gripper arms and gripper fingers being disposed substantially flat against the face of the platen with the fingers overlying the sheet to be printed. When the platen is retracted the arms are simultaneously moved with it so that the sheet of paper is withdrawn from the type-bed by the gripper fingers. The arms themselves may be adjusted toward and from each other in accordance with variation in the width of the type-bed and the paper, and the fingers may be adjusted up and down on the arms so as to clear the type and at the same time engage the sheets of paper on the platen.

It should be manifest from the foregoing that I have provided grippers capable of a wide latitude of adjustment without changing their relation to the gripper bar, and that the grippers serve to positively withdraw the paper from the type-bed at each actuation of the platen.

The proportions and minor details of construction of my invention may obviously be varied within considerable limits without departing from the spirit of the invention as defined in the following claim.

I claim: T A paper'gripper for job presses, comprising an arm provided at one end with an elongated bolt-receiving slot permitting at tachment of said arm-to gripper bars of various widths, said arm being also provided with a longitudinally disposed slot having grooves at each side thereof on the front face of the arm, a finger shaped at its base to provide a channel adapted to embrace and slidingly fit three faces of the arm, the main portion of the finger being extended from the base fiush with the front face of said arm, a bolt passed through the base of the finger-and the slot of the arm and having a head slidingly fitting but non-rotatably disposed in said grooves, and a nut threaded onto said bolt whereby the finger is adjustably clamped on said arm.

HARRY B. ANVVAY.

Vfitnesses r A. G. LATIMER, L. G. SNYDER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents, Washington, D. G.

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