US1043105A - Printer's plate-hook. - Google Patents

Description

M. HOGE- a; J. W. PITT. PRINTERS PLATE HOOK. APPLICATION FILED ROVJ), 1911. fiENEWEU JULY 12, 1912. 1,043,105.

Patented 1w; 5, 1912.

Y W m aat Mine/Jaw UNITED STATES PATENT oFFIonj MAX JOHN PITT, OF CHICAGO, ILLINOIS, ASSIGNORS TO UPRIGHT GRAIN PRINTING BASE COMPANY, OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

tenmrnns PLATE-HOOK.

Specification of Letters Patent.

Application filed Novcmlidrh, 1911, Serial No. 659,270. Renewed July 12, 1912. Serial No. 709,066.

To all whom it may concern:

Be it known that we, MAX Hose and JOHN WV. PITT, citizens of the UnitcdStates, re-

siding at Chicago, in the county of Cook and State of Illinois, have invented new an useful lmpro rements in Printers Plate- Hooks, of which the following is a specification, reference being had to the accompanying drawings, forming a part thereof.

The purpose of this invention is to-provide an improved device of the character of a plate-hook- :tor locking printing plates in a form.

It consists of the features of construction shown and described in the drawings as indicated in the claims.

In the drawings :Figure 1 is a Vertical section through a portion or a form with a plate-hook therein embodying this invention. Fig. 2 is a plan view showing a portion of a form with two similar plate-hooks positioned for holding a printing plate in the form. Fig. 3 is an end elevation of the plate-hook shown in Fig. 1. Fig. 4 is a section taken as indicated at line l4= on Fig. 1, and also showing a keyor wrench in position for adjusting the clamping device. Fig. 5 is a detail of the jaw member, being a bottomplan view thereof. v

In the drawings, A, represents one slde' of the chase; B, block in the frame; C, the printing plate thereon.

j The plate-hook comprises a I block or frame, D, of the height of the plate base, B, having a longitudinal channel or way, 1), extending from end to end and opening up through the to p of the block but not through the bottom, the opposite sides of said chan nel or way beipg provided toward the upper side with horizontal grooves, D D The hook or jaw, E, whose overhanging lip, c, is to engage the plate, C, is slidably mounted in the grooves, D D, and is thus adapted for adjustment toward and from the plate, C. Such adjustment is accomplished by means of the controller screw, F, set in the jaw, E, with its axis perpendicular to the plane of the bottom wall of the channel, D, this bottom wall being inclined to the direction of the grooves, D D and to the direction of adj ustment of the jaw, E. The threaded aperture in the aw, E, which contains .the adjusting" controller. screw, F, is continued upwardly. in an aperture, E through which the squared end of an operating key, G, may be inserted for engaging the squared recess, F of the screw, and rotating the latter for adjustment of the jaw, E.

The above described construction'is de-' signed as an improvement upon that shown in the issued Patent, No. 989,153, in which the controller screw, F, was provided with a flange at its lower end, engaged in inclined guide-slots; this necessitated the rotation of the screw for accomplishing any movement of the jaw, E, in either direction along the bloclc, D. But, in the present construction, the jaw may be much more readily released from the plate, C, by rapidlyunscrewing the screw, F, and sliding the jaw, E, out of engagement with the plate; and similarly, this arrangement allows or quicker adjustment-of the jaw for securing the plate, C, such adjustment being made by merely slid ing the jaw to the position in which its overhanging lip, e, engages the plate, C, when a slight turn of the controller screw, F, will serve to clamp the parts in position.

. As a further improvement upon the form of the device shown in the above-mentioned Patent, No. 989,153, the portion of the jaw member, -E',"which is carried in the channel,

D is made circular in cross section so as to lie-rotatable therein. This circular partcomprises the bottom flange, E which is carried in the guide grooves, D D and the top of the jaw member just above this flange,

' indicated at E and positioned between the lips, D, D, of the block, D; This con Patented Nov. 5, 1912.

struction permits the clamping lip, e, to

accommodate itself to any irregularity in the outline of the prlnt-ing plate, C, when such outlines do not lie exactly perpendicular to the direction of the channel, D this avoids the undue strain upon the lip, e, which would result if such accommodation were not possible.

It will be notedtha-t the drawings show I the bottom wall, D, of the channel, D as curved or rounded transversely. The puiy pose of this rounding of the bottom of the channel is to neutralize to some extent the efiect which any slight rotation of the jaw member, E, within the channel, will'have upon the angle at which the screw, F, meets the bottom of the channel. It will be understood that ifthe channelwere made with a flat bottom, then-the screw, F, would stand perpendicular to this bottom only when the screw would be directed guide ways,

horizontal or at least groove, D D ,Such

I wall of the channel at an acute angle. If the bottom of the channel, D could be so curved that when the jaw member, E, were rotated about its axis within the channel, the screw, F, would still stand erpendicul'ar to the bottom wall, D, and the entire force of the to clamping the printing plate and would not tend to create any undesired strains in the block, D; Although this condition cannot be perfectly lfulfilled, t-he wall, D, might be formed as the surface of a cone whose axis should be the path of the point of intersection of'two axes, namely, those of the screw, F, and of the cylindrical jawmember, E, respectively,the axis of such cone would thus be parallel to the guide a surface would prevent any side thrust fromthe screw, F, upon the guide groove, D D when the jaw member, E, were rotated away from its normal straight-ahead position, and would insure that the entire force of the screw was directed against the printing plate to be clamped. Whil'eit might not prove worth while to manufacture the block with the surface, D, conforming exactly to this theoretical surface, it-is found preferable to give it a curve approximating such a surface, and such a curve is shown in the drawings.

1. A printers plate hook, comprising a block provided with longitudinal guide ways,- and having an interior wall whose plane is oblique to the direction of such guide ways, a jaw member slidably mounted in the guide ways, and a clamping device on the jaw member adapted for movement toward and away from the oblique wall of the block and for exerting pressure thereagainst.

2. A printers plate hook, comprising a block provided with longitudinal guide ways, and having an interior wall whose plane is oblique to the direction of such a jaw member slidably mounted in the guide ways and havin a threaded bore whose axis is erpendicu ar to the oblique wall of the b ock, and a clamp-screw engaged in said bore adapted for adjustment toward and away from said oblique wall.

3. A printers plate hook, comprising a aving a longitudinal channel provided with longitudinally horizontal guide ways in its sides and a longitudinally sloping.bottom; a jaw member mounted slidably positioned directly ing an oblique bore in the horizontal guide Ways and rotatable ber having a bore extendin through it from top to bottom and three ed, and a screw engaged in said bore, accessible through, the upperend or the bore for adjustment toward and from the slopingbottom wall of the channel.

4. A printers plate hook, comprising a block havin a longitudinal channel provided with ongitudmally horizontal guide ways 1n its. sides and a slo ing bottom a jaw member mounted in the ways, slidably and for rotation of the jaw about a vertical axis, said jaw member having an oblique bore extending through it from top to bottom whose axis is inclined in the direction in which the and accessible through the top of. the bore for adjusting it toward and from the sloping bottom.

A printers plate hook, comprising ablock having a longitudinal channel videdways in its sides and a jaw member mounted in the horizontal ways", slidabl-y and for about a vertical axis,

pro-

1de rotation ofthe jaw said jaw member havextending 'throu h it from ,top to'- bottom whose axis is inc ined in the direction in which the jaw feces, and a screw engaged with the threaded bore and accessible through the top of the bore for adjusting it ,toward and from the sloping bottom, the bottom end of the screw being spherically curved for bearing at different angles upon the slo ing bottom.

6. A printers p ate hook comprising, a block having a longitudinal channel provided with longitudinally horizontal guide ways in its sides, and a longitudinall slo ing bottom; a jaw member'mounted s idabi y in the-horizontal guide ways and rotatable therein about a vertical axis, said jaw'member having a bore extndin through it from top to bottom and threade and a screw enorizontal gu1de.

jaw faces, and a screw engaged with the threaded bore with longitudinally horizontal guide sloping bottom, a.

gaged in said bore accessible to the upper 4 end of the bore for adjustment toward and from the sloping bottom wall of the channel,

the said bottom wall of the channel being transversely concave and the end of the screw which operates thereagai nst being spherically rounded.

In testimony whereof we have hereunto set our hands at Chicago, Illinois, this 28th day of October 1911.

MAX HOGE. JOHN w, PITT.

Images