US869607A - Stereotype-plate holder. - Google Patents

Description

PATENTED OCT. 29, 1907.

J. S. WEYL.

STERBOTYPE PLATE HOLDER.

APPLICATION FILED DBO. 28. 1908.

v WINESSES ATTORNEY.

purposes intended.

JULIUS S. WEYL, OF

PHILADELPHIA, PENNSYLVANIA.

STEREOTYPE-PLATE HOLDER.

Specification of Letters Patent Patented Oct. 29, 1907.

Application filed December 28. 1906 serial No. 349,767"

tion, reference being had to the accompanying drawings, forming a part of this specification.

My invention relates to holders for printing plates, and has for its object the improvement. of such devices now in use, in those particulars in which they have been found, in practical use, to be defective or inadequate for the purpose intended Devices-of this class are of the nature of clamps coacting with a diagonally grooved supporting-block, the ultimate result sought being to clamp a printing plate securely on the supporting block. Such devices are used by printers in making up "forms" for the printing press, and it is es sential, from a practical standpoint, that the clamping elements, one of which is hidden from sight in the groove in the block, should be ofsuch character, as to be guided with certainty into register when sought to be assembled, and also that the clamping should be so cure against liability, to accidentally become loose, which can only be effected by means operating to lock the beveled clamping out to the corresponding shaped walls of the groove, when the elements are brought into clamping position rclati vel y to the grooved supporting-block and the printing-plate to be lixedly held thereon in making up the form.

My improved holder is predicated upon a type of such devices as shown in the U. St Patent dated No; vember 18, 1900, No. 66l,780 to Ferdinand \vesel, and it is designed to improve such device in those features and mode of operation in which, in practical use by me I have found it to be defective or inadequate for the The supportingblock having a series of parallel dovetailed grooves, extending diagonally from edge to edge of the block, with nuts adapted to rest in the grooves and complemental screws adapted to register with the nuts and hold an interposed clamping plate againstthe underlying printing plate, have long been used in the-printers art: and the Wescl device before referred to embodies specific forms of such clamping plate and nut, having consider able utility, but inadequate in two respects, namely, the nut being hidden from view when the printing plate is placed upon the supporting-bloclr, it was diflicult to cause the screw to find the screwtlireaded hole in the nut and thread therewith, and also in that dc vice no means were provided to secure the nut in locked position and prevent it returning into unlocked position; the tendency of the heavypross rollers pass ing over the printing-plate clamped on the block, straining and frequently loosening the clamping means. My invention consists in providing BIC 31h, in such a device, to overcome these defects, and hence consists in the combination with a snpportingblock having a series of parallel grooves larger at the base than at top, preferably dove-tail in form, extending diagonally across the block, of a lock-nut somewhat less in thickness than the depth of the groove, slightly less in crosssection than the width of the groove at its base, and of a form in cross-section adapted to coincide with the vertical walls of the groove, and adapted to enter and slide in the same, and of a suitable length preferably twice that of its width, and having a central vertical screw-threaded slot through it: a clamping-plate of corresponding length approximately, with one or more of its longitudinal walls beveled and sufficiently wide to overlap the groove, and having a diagonally arranged shallow rib on its under face adapted to freely enter the groove in the block and operate as a guide for the clamping plate, a central ve tical countersunk slot passing through it and extending through its said rib; and a locking screw having a threaded shank adapted to leg istcr with the slot in the ribbed clamping-plate and with the screw-threaded slot in the lock-nut, and having a pointed end below its shank adapted to reach beyond the under face of the lock-nut when the parts are assembled and extend to and bear against the base of the groove in the supporting block, and operate to force the bevel edges of the nut into coincidence with the bevel walls of the groove in the supporting block.

In the accompanying drawings illustrating my invcntion:Figure l is a plan view of a portion of the grooved supporting block, and the clamping devices holding the printing platc in position on the block, and constituting the plate-holder; and Fig. 2 is a vertical section thereof on the line 2-2 of Fig. 1. Figs. 3 and 4 are plan views of a section of the block and cooperating clamping devices, the former showing the locked and r the latter the unlocked position. Figs. 5 and 6 are vertical sectional views of the same parts, on lines 5 and 6 of Figs. 3 and 4 respectively and also intended to illustrate the locked and unlocked positions; and Figs. 7, S and E) are respectively elevations of the screw, the clamping-plate and the loch-nut.

I; said rlmwings: indicates the usual supportingblocl; for a series oi printing plates 2, and it is provided with itserics of parallel groovcs 3 extending diagonally across the face of the block, at an angle of about fortytlve degrees. These grooves are wider at base than at top, and preferably of dovetail form in crossscction. 1n conjunction with said grooved block the plateclampiug device consists of a clamping plate 4 which is flat oblong plate, rectangular in planular outline, with one or more of its longitudinal edges 12 inwardly beveled, it is preferably of it length itpproxlulfiltely twice its width and sufficiently wide to overlap the groove 3 on both sid es and rest by its bevel edge on the reverse corresponding bevel edge of the interposed printing pin-to 2. On its undo L 4 is provided with a iiko diagoizciiiyu-rrmigod shallow rib 5 adapted to freely en 1110 q" vow 3 in the block 1, and operate. s a guide for the p 113d said plate l has :3. con ti'ztily counter-sunk ope L imrding thimigir it, and through the rib 5 on The eorow 7 has a beveled lic countersunk slot 6 in i he cl 8 is threaded as usual, but it threaded shank with. an arch iorniancc of the functions her-e1 Tm:- stated. nut 10 is of a thickness somewhat? less than the depth of the groove 3, of a wid'h to wit-.311. it to freely enter groove 3 lo the block 1, our) 03 :1 k t. approxinmteiy twice its Width, and ha ing; 11 cz-nmii vertical. screwthreaded siot 11 passing tlu i4; iiio longitudinal edges 10 of s lock-nuturc 'ucw at when iiitezi in the groove 3 they will. he: coin: part of the beveled walls f he be locked against the same o-F Woo as held contact therewith.

Marginal piateimrs 14 are commoniy used to secure two sides of a printing p ittcon {You supportmg-block. In such case 1 umwl those with their iong'k tudimm'l edges beveled as in cow of the clamping plate 4, also with ding mm ribs 5 on its uiuloriztce, and countersunk openings with extended slots or plate 4, and. its shit-n1: nrovidod beyond the .(i point 9 for the peri The lockictionai 6 2.11 oponings-l see fig. E)-so toiat, when pieced in pooi tion in the grooves 33 of tho block i tol-y may no clamped by employment therewith oi the screw and iock-nut elements omploycd with the clamping oiete and in like manner Tho operation of the device is an follows. The mar ginai plate-bars M, if used be the block 1, and the pr iting plate being lined up against the same by two oi its sidoa, a proper number of lock-nuts 1G are placed in the grooves 3 of the block, Inovedup therein against the vertical plane of the edge oi the printing plate, then a dimming-plate over each of the some, with its bevel edge over opping the roveree bevel edge of the printinpioie, and the s'orew then applied as shown in Fig. 3 and turned in; the direction shown in Fig. 5. The screw by its-long point finds with ease and certainty the slotted opening in the hidden iockuuxt and the screw-Lhrcz'id therein; whoreupon a continuing turn of the SCXC-W, its point linds a 4 piacecl in the b33521 will of tho roovo 3 and the iocimiut posaibie for r 1 slump to become loose save by 3 to My invention, Sil'llli'JI as it is, has proved of great pmnticni utility not ou v in the saving of time of mm ployeos in mild up i0 s but in the prevei'ition oi the printing-pin Having thus fie iood my invention, when; 1 do as new and dcsirc to secure by Letters Patent is:

1. A. holder'ror priming-plows comprising i1 (liagon allyiporiinglilock. the grooves having a grc r dth 5': 131's w'n ii, and having its longitudinal edges beveled, and be I slightly less in thickness than the d pi'h of said groove, and aduptcd-to fz'ocly outer said groove ml 3e herein, a, ciampingminto having one of its: lougiturl l edg s beveled and )mvidod oar its undoi'faco with a diagonally screw having; its threaded shank provided with an extended pointed o adapted to bear against the nasal wail of the groove in he support inguUCk when its beveled-head is brought into coincidence wlth the countersunk opening in the sail clamping-plate, and operating to look the nut in the upper portion CfwSl'liil groove.

2. A holder for printing-plates comprising a supporting block havi. g parallel beveled grooves arranged at an an to the 's'of the block, a locl n\1t having its longitudinal edges beveled :it a corresponding angle. and adapt ed to freely enter and slide in sai'igroovos said nut being of greater length than width Purl slightly less in thickness than the depth of said grooves, .1 clumping-plate havingone or ooth 06 its longitudinal edges inwardly beveled and provided on its underfaco with a diagonally-P igor} Shallow rib adapted to enter and guide the plate in t groove of; the block, said plate having a countersunk slot extending through it and its rm and a bevel-headed screw having its threaded shank provided with an extended point of a role. this length adopted to hem 1112mm the basal wail of the groove when the parts arc brought into register and llft the bowl edges of the nut into coincidence with rm beveled wal a of the said groove in the supporting-block JULIUS WI-TEL.

.ViilltSScs' I becoming loose in the form.

than at top, a loclanui: 01' greater length ii an angerl rib, a countersunk oponingextonding through it amiyurough said .rib, and o bevel-headed

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