US1898530A - Sheet gauge - Google Patents

Description

Feb. 21, 1933. J. FLOCKII-IARI. 1,893,530

/ SHEET GAUGE Original Filed March 17 1930 INVENTOR.

A TTORNEY.

- per with the sheet gauge to hold the paper Patented 21,

Y se asse "JAMnsfnLoc nAnT', on em FRANCISdO, EALIFOBLTIA. Assreiron' To an FLOo HAnT co'.,'or SAN ,r mcrso cat ronnm, .-,A consort-amount CALIFORNIA 7 Application filed 'March-17, 1930, Serial This invention relates. to improvements in sheet gauges, andmore particularly to a combined sheet ing machines. V o I Among the objects of the invention is to' facilitate the placement of the sheet gauges on the platen, with respectito the form or stencil in printing machines, 7

Another object is to combine a paper gripagainst shifting during the printing, embossing and stamping ioperationio Other objects and advantages will 'appear as thejdescription progresses.

A further objectis to provide a combined sheet gauge and gripper which may be "de-o pressed below the plane of the platen.

' "In'this specification and'the accompanyingdrawing, the invention is disclosed in its preferred form. But it is to be understood that it is not limited to this form because it may be embodied-in other forms. It'is also to be understood that in and by the claims following the description it. is desired to cover the invention in whatsoever form 'it may be embodied. or I Broadly'stated, the invention consists in combining the sheet gauges and depressible V sheet grippers ina plate which may be ad-' justablyattached to the platen or bed of the printing machine. In the one sheet of drawing: I I

Fig. 1 isa fragmentary plan view from above of a combined sheet gauge and gripper in a plate applied to aplatenin accordance with this invention; V a

2 is an enlarged detail in longitudinal vertical sectionoon the line II-II, Fig.1,of

407 the gripper gange inthenormal position;

7 Fig. 3 1s a slmllar view of'the same 1n the operative position. i Fig. 4 is a similar view on the line IVIV, showing one manner of adjustably fixing the plate to the platen; 7 In detail theconstruction illustrated in the drawing comprises the gauge plate 1, having the throats 2, and the sockets 3, therethrough. The slots 4 extend laterally through the plate from the edge of the holes. The grooves -5,

au e and ri er for'printg b g pp I ably. semi-circular, jto lit freely within the throat 2. This head is squared vertically on edge of the plate 1. v

I stem isheld securely-in -p ;plateby thefrictional engagement of the 7 m5. 436,502.- Renewed May 24, 1932.

theundersideof the plate; The-gauge consists of :the head 6, preferits diameter at? parallel with the adjacent A The l1ead16 is mounted on the spring wire stem 8, which extends through theslot 4', into the grooved. and isbentupward to form a pin 91 engaging, in the socket 3. l a

osition in the pin and socket 93, but may.- be removed by grasping the head 6 and moving it downward parallel with the. axisof' the. pin 9. These gaugesam securely held in operative positionwhen the cubed-10. o.

In .silk stencil printing. apparatus the platen-. 10- is preferably composed of non warping wood veneer panel, in" which case bythe thumb tacks 11, passing through'the countersunk holes 12 in; the plate,.the heads 1 Iofthe tacks beingafl'ush with the top plane the :plate 1.. On metal platens the plate 1 canbeslotted'at intervals. along its margins to engage v cap screws threaded-into the platen 10.-' Theplate l lcan be attached in any manner best suited to the conditions gThe plate 1, functions'as the top surface of the'platen, and: is preferably composed of metal. to. withstand thei' pressure. in printing presses. For the stencil printing apparatus,

plate rests upon the platen thep'late Icanbe adjustably secured thereto e0 to be metQbythOseskilledintheart.-

where there is little-017.110" pressure, aluminum is desirable because of its lightness. T'hegauges are arranged along two sides ofthe plate 1, onv lines exactly degrees to each other or at right; angles to the edges of thesheet 1 3..resting upon the plate, see dotted lines, Fig. 1. i

.I IGIGtOfQIfG it has been the practice'in the pri'n'ters'art to'cover the platen'with a sheet against which'the sheet can be alined for The placement of indivi dual gauge pins or 9' QfApaper-"attached thereto, 'then stick pins," l through-the paperor paste guides'thereom guides, as previously practiced, is a tedious labor and time wasting operation.

It is necessary to guide only two edges of the sheet, irrespective'of its size or shape.

stencil.

not to injure the same or interfere with its. impression. In the present instance the gauges 6 mounted upon the spring wire stems 8 depress into the throats 2 if so located that they come within the margin of the form or stencil. This is particularly valuable in the latter case, since the stencil being of fragile silk cloth, suchas bolting cloth, would be injured. or' the impression marred if the guide did not give way under pressure.

In the economical use of the stencilit is often desirable to distribute several jObs or impressions throughout. the area 'of the This is possible bythe use-of this invention openings having grippers thereon coacting with the edge of said openings.

3. A sheet gauge comprising a plate having openings therein'arranged along two edges thereof, resilient guides in said openings, and grippers on said uides coacting with the edges of said openings.

4. A sheet gauge comprising a plate having I arranged along two edges thereof throats and sockets joined by slots, guides: movable in said throats and mounted upon spring stems extending into said slots and engaging said sockets; and grippers on said guides coacting with the edges of said throats.

5. A sheet gauge comprising a plate having throats therein, resilient guides in said throats, a platen, countersunk attaching means in said plate detachably engaging said platen.

In testimony whereofi'If have hereunto set my hand this 10th day ofMarch, 1930.

I 7 JAMES FLOCKHART.

This requires that the gauges be within thearea of the stencil impression.

without danger to the texture of the stencil.

By the thumb tack 12 adjustment, guiding the sheets to insure perfect registration, con;

' the stencils for each color block or area. 7

It is equally important to grip the edge of the sheet to prevent it shifting prior to or during theprinting operation. This is. ac- I A complished by the gripper lug 14 on the head Goverhangmg the edge'Z, and adapted to spring the margin of the sheet 13 down into the throat 2, and clampthesheet adjusted position, see Fig. 3.

I This depression of the heads 6 occurs when the surface of the stencil orjany partof the frame, such as 15, descends upon .them. The

upper surface of the heads 6 should be slightly' convex to protect the stencil.

' The number of gauges used in either or both series will depend upon the size of the sheet 13 or the amount of gripping necessary to prevent it from shifting. 1

' Having thus described this invention, what se'cutive color impressions on a single sheet can be quickly accomplished after changing I claim and desire to secure by Letters P t;

ent is: V

1. A sheet'gauge comprising aplate having therein a throat and a socket joined by a slot, a guide movable in said throat and mounted upon a spring stem extending lnto @SZLICl slot and engaging said socket.

.2. A sheet gauge comprising aplatehaving openings therein, resilient guides in said

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