US2519809A

US2519809A - Printing plate coating machine

Info

Publication number: US2519809A
Application number: US693846A
Authority: US
Inventors: Zarkin Charles; Bernard R Halpern
Original assignee: ZARKIN
Current assignee: ZARKIN
Priority date: 1946-08-30
Filing date: 1946-08-30
Publication date: 1950-08-22
Anticipated expiration: 1967-08-22
Also published as: GB651895A

Description

Aug. 22, 1950 c. ZARKIN ET AL 2,519,809

PRINTING PLATE COATING MACHINE Filed Aug. 30, 1946 3 Sheets-Sheet l Aug. 22, 1950 c. ZARKIN ETAL PRINTING PLATE COATING MACHINE 3 Sheets-Sheet 2 Filed Aug. 30, 1946 INVENTORS Charles Zarkl'n &

fie! ardfi Hem BY I Aug. 22, 1950 c. ZARKIN ET AL PRINTING PLATE COATING MACHINE Filed Aug. 30, 1946 s sheets-sheath INVENTQRS Charles Z 0141112 & BernardBHavern Patented Aug. 22, 1950 PRINTING PL TE COATING MACHINE Charles Zarkin and Bernard H. Halpern, New York, N. Y., assignors to said Zarkin Application August 30, 1946, Serial No. 693,846

9 Claims.

The invention disclosed in this patent relates to machines for applying the sensitive coatings to printing plates and generally known in the art as whirlers.

Special objects of the invention are to provide such a machine with a top or cover construction which will afford ready inspection, placing and removal of the plates and which while providing full accessibility will not require much overhead clearance, even in the large size machines and will be so balanced and arranged that it may be easily opened and closed by one operator and remain in the various positions to which it may be shifted.

Other important objects of the invention are to provide efficient ventilation and drying for the plates.

Further special objects are to accomplish results indicated without adding objectionably to. the bulk or cost of the machine.

Other desirable objects attained by the invention will appear in the course of the following specification, wherein the novel features of the invention are set forth and broadly claimed.

The drawings accompanying and forming part of the specification illustrate present commercial embodiments of the invention. The structure, however, may be modified and changed in various respects, all within the true intent and broad scope of the invention as herein defined and claimed.

Fig. 1 in the drawings is a plan view of a Whirler incorporating the invention.

Fig. 2 is a side elevation of the same in closed position, with broken lines indicating the cover opening operation. i

Fig. 3 is an enlarged broken and part sectional side view with broken lines indicating the cover opening operation.

Fig. 4 is an enlarged broken sectional detail on substantially the plane of line 4-4 of Fig. 1.

Figs. 5 and 6 are broken sectional details of one of the pivotal end connections for the balancing link, Fig. 6 appearing as on the line 6-6 of Fig. 5.

Figs. 7 and 8 are broken sectional details of the reversely disposed hinges for the inner and outer lid sections. j

Figs. 9 and 10 are plan and. side views respectively of a modified form of the invention.

In the whirler shown, the lid or cover is made in three sections, a narrow normally stationary section It] affixed to the tub ll, an intermediate hinged section I2, and a front hinged section I3.

The intermediate or main section I2 is shown hinged to the stationary back section It) by leaf hinges l4, on top of these sections, as shown in Fig. 7, and the front section I3 is hinged tothe front'edge of theintermediate section 12 by leaf hinges I5, Fig. 8, at the under side of these sections. I

This enables the hinges to break as-shown in Fig. 3, with the middle section !2 folding upward and the forward section it folding downward with respect to the middle section supporting it.

The front section is caused to lift in substan tial parallelism with the tub, that is, substantially horizontal at all times, by means of a positioning radius rod or link 16, Figs. 2 and 3, pivotally fulcrumed at I l to a fixed strut I8 projecting upwardly at the back and forwardly over the top of the tub, and pivotally connected at its forward end at l9 to a lever 28 fixed at 2| on. top of the front lid section and inclined upwardly and rearwardly from the hinge axis of the same.

The positioning link It is shown made up of two rod sections coupled by a turnbuckle 22 adjustable to maintain the parallelogram necessary to effect the horizontal lifting of the front cover section and to cause both movable cover sections to close down flat on the rim of the tub.

The lid made up of the two movable cover sections is counter-balanced in the illustration by two sets of

weights

23, 24, Fig. l, at the rear ends of

lever arms

25, 26, attached to the top of the rniddle section 52 outwardly of the hinges i l and projecting rearwardly from the hinge axis. The rearward ends of these weight carrying levers are shown in Fig. 1 connected by a cross bar 21, which may constitute an integral portion of such levers and in which event the levers and rearward connecting part may all be portions of a single U-shaped frame such as illustrated. For lightness and stiffness this U frame may be made of channel iron and the weights be in the form of heavy discs secured by through bolts 23 on opposite sides of such channel iron frame.

The lid sections may be made of channel or angle iron frames such as indicated at 29, Figs. '7 and 8, covered by sheet aluminum 3%, this providing a desirably light but rigid and strong construction.

In the closed position, Figs. 2 and 3, the movable cover sections rest flat down on top of the rim of the tub and in this position over-balance the weights 23, 2d, so as to remain firmly and securely closed during all ordinary operations of the machine.

To open the lid it is only necessary to apply lifting pressure to the movable front section It. With proper counter-balancing only a relatively slight force is required to start the lifting movement and as such movement progresses the counterweights, through the leverage provided by the

arms

25, 26, take control and complete the cover opening movement and hold the cover in partly or fully opened relation. In the final position the whole interior of the tub is fully accessible and the movable cover sections are up out of the wayandrclear of allusualoperations.

The closing of the'cover may be effected 'by a slight downward pull on the front cover section, just enough force being necessary to overcome the lifting advantage of the counterweights ,in the lifted position of the cover.

For some installations it :maybe desirable -,to have foot-operated or foot-initiatedmovericlosing or opening mechanism, suchas illustrated in Figs. 1 and 2, and embodying alever 3| pivoted on the base of the machine at 32, carryinggafoot pedal 33 at its forward end and provided with an incline or cam 34 at its rearward end, arranged to reach under the weight '24 in its lowered position. With this construction a slight downwardpressure on the pedal will effect the rocking of the counterweight lever.26 in a cover closing direction. Ordinarily, with the construction shown, it may be only necessary to initiate this cover closing movement, the lid then lowering by its own weight after passing the-center where the counterweights lose control.

The parts may be made largely of structural steel such as angle and channel iron. Thus the fulcrum strut 8 for the equalizing rod l5 may be simply a length of channel iron such as shown in Figs-3 and lrbolted at 35 to the rim of the tub. Similarly, the

bent lever

29, 2!, may be a length of channel iron. The eyes 36 at the ends of the turnbuckle rods, may be pivoted on bolts-37 secured across the flanges of these channel irons, withspacer washers or sleeves 38 holding them in .1proper,:freely pivoting alignment.

.Withall the advantages mentioned andothers that will be apparent from this disclosure, the structure is relatively simple and inexpensive.

The parallelogram linkage in association with the-counter-balancing levers, aids in stabilizing thesmooth easy opening and closing movements of ."thecover sections and enables the cover .to stand orbe held with light pressure at any intermediate position between the fully open and closed positions. The location of the closing pedal at the front of the machine enables the operator to conveniently control the cover opening and closing movements. With a slight lift on ..the,:front cover section, the cover -may be started in the opening direction, finishing such movement under-the pull of the counterweights as they gain advantage in the upward travel of the cover sections. Pressure on the foot pedal may beutilized to raise the cam. to cheok or stop the opening movement, in addition to or in place of the usual ornormal purpose of initiating the ..cover closing movement. This foot pedal may beconnected and arranged to initiate or effect the cover opening movement as well, or if desired, one pedal may be providedfor opening and a second pedal for cover closing-purposes.

While usual to have the rear cover section- 1 0 fixed orstationary, this sectionmay be hingedly or removably connected with the tub to provide further access for cleaning the rearor innermost portion of the tub.

..In.-some .machines and particularly those of the larger, sizes, it may be desirable to incorporate ventilating and drying facilities. These are provided in the machineillustrated in Figs. 9 andlO by equipping the front cover section l3 with ventilating louvers 40 and by the provision ofa hood 42 for projecting heated air down through the top of the rear cover section I0.

The controls for the heater-blower unit and in fact for the main motor and such other accessories as thermachineqmay have, such ,for example, as tthezredzand white lights 1142, a within the tub may all be located at the front of the :machine as on one or more control panels such asv indicated at 45.

-In some instances it may be desirable to pro- .videsa :catch for-securing the lid in closed posi- .tion, such as-rthe gravity type latch indicated at 46,,also,a handle such as indicated at 41 for obtaining a convenient grasp on the front cover section.

In the larger size machines it may be desirable toreinforce :the bent

lid lifting lever

20, 2| as by struts 48 welded across the angularly related portions of such lever.

In the machine illustrated in Figs. 9'and'10 the counterweight levers 25, :26 are ,leftdisconnected-at therear and this machine is shown without the ,lid closing footpedal. It should be understood, howeverflthat these features may be incorporated in or left off either or both the machines illustrated.

The double hinged parallel motion lid con- Struction; provides maximum accessibility with a minimum of necessary overhead clearance. Rising horizontally as it does, the front lid section does-not-require any additional overhead space above-that required for theopening of the intermediate cover section. Consequently, these whirlers-may bedocated invplaces where it ,would be impossible tousejamachine having av conventional one piece hinged cover.

What is .claimedis:

l. 'Awhirler cover comprising a relatively fixed, stationary cover :section and coplanar movable cover sections,1the movable cover section adjoining the stationary section being hingedly connected'therewith on top of the cover andthe movable sectionsbeing hingedly connected together at-the under :side of the cover, a lever extendingfrom one-movable cover section. over the other-movable cover-section toward the stationary cover section, a fixed strut extending above and ,overthe stationary cover section in line with the inner end -,of said lever,.an equalizing link pivotally connected betweensaid strut and said lever and means 'f,or counterweighting the combined weight of the movable cover-sections.

:2. A Whirler cover comprising a relatively fixed, stationary ,cover section .and .coplanar movable 1 cover sections, the movablecover-section adjoinins 1 the stationary section being .hingedly connected itherewithon top of ,thecover and the movable sections .being1hingedly connected 'toet'herzatitherunderside. of the cover, a lever cxtendingfrom one movablecoversection over the other movable cover section toward the stationary-cover section, a fixedstrut extending above and overithestationary cover section in line with the inner end of said lever, an equalizing link pivotally connected between said strut and said lever andzmeansifor..counterweighting the combined :rveightof the movable cover sections includinga: U; frame secured at opposite sides over the :top of :themovable section which is hinged to. the stationary section and having the connectingportion o'f-the'same extended rearwardly beyondthe hingeaxis of said -cover-section,.and weightson said :side portions of v the i U frame.

;-23..A.whirler1top comprising a sectionalcovcr,

heatenandsblowerll at the rear, having aiflaring 75 the sections :of-saidrcover lbeing 'hins y-wnnected together and the inner one of said sections being fixedly Supported, a lever on the outer of said cover sections extending rearwardly of the hinge line connecting said sections, a radius link pivotally connected therewith at one end and pivotally connected on a fixed fulcrum at the opposite end for maintaining the outer of said cover sections in generally horizontal relation in the opening and closing movements of the cover and means for counter-balancing the combined cover sections and arranged to overcome the combined weight as the cover sections are raised and to under-balance the cover sections as the same approach and reach the closed position, a foot treadle adjacent the base of the machine and means operated thereby for overcoming the advantage of the counter-balancing means in the raised position of the cover.

4. A whirler top comprising a fixed cover section, an intermediate cover section hinged on top of said fixed cover section and arranged to swing upwardly, a front cover section hinged to the under side of said intermediate cover section and arranged to swing downwardly as the cover sections open upwardly, linkage connected with said front cover section for maintaining the same in general horizontal relation while said cover sections are opening upwardly including a lever on the front cover section extending rearwardly of the hinge line connecting that section with the intermediate section and a radius rod pivotally connected with said lever, counter-balancing means acting on said intermediate cover section and means for imparting lowering, closing movement to said hingedly connected cover sections, said radius rod being pivotally connected at one end with said lever and pivoted on a fixed fulcrum at the opposite end.

5. A whirler comprising a tub, an upwardly lifting sectional cover hinged to said tub and including hingedly connected front and back cover sections, levers extending from said back cover section past the hinge axis of said section to the rear of the tub, weights on the rearward ends of said levers, a lever extending from said front cover section on an upward incline rearwardly beyond the hinging axis of said front cover section, a fulcrum strut at the back of said tub and an adjustable radius rod pivotally connected at its opposite ends with said fulcrum strut and with the rearward end of said upwardly inclined lever.

6. A whirler comprising a tub, a cover hingedly connected with said tub and comprising hingedly connected front, intermediate and back sections, linkage including a rearwardly extending lever on the front cover section and a radius rod pivotally connected therewith for maintaining the front cover section in substantially horizontal relation during opening and closing movements of the cover sections, a counter-balancing lever extending from the back cover section rearwardly of the hinging axis of the same and to the rear of the tub and leverage means engage:- able with said counter-balancing lever in the raised position of the cover sections for imparting lowering, closing movement to the cover sections, said back cover section being supported in stationary relation, said rearwardly extending lever being secured fast to the front cover section and projecting rearwardly toward the back cover section and said radius rod being pivotally connected at its forward end with said lever and pivotally fulcrumed on a fixed center at its rearward end.

7. A plate coating machine comprising a tub having rear, intermediate and front cover sec tions, said rear cover section being connected in stationary relation with the tub structure, a drier at the rear of the tub including a ventilating blower having an entrance way into said rear cover section, the intermediate cover section being hingedly connected with said rear cover section and the front cover section being hingedly connected with said intermediate cover section and means for controlling and counter-balancing opening movements of said intermediate and front cover sections including a rearwardly extending lever on the front cover section with a radius rod pivotally connected therewith and a rearwardly extending counter-balancing lever on said intermediate cover section, said rearwardly extending lever being secured fast to the front cover section and said radius rod being pivotally connected at its front end with the rearward end of said lever and pivotally fulcrumed on a fixed center at its rearward end.

8. A whirler comprising a tub having a back cover section at the back of the same, an intermediate cover section hinged on top of said back cover section and arranged to swing upwardly, a front cover section hinged to the under side of said intermediate cover section and arranged to swing downwardly as the cover sections open upwardly, linkage connected with said front cover section for maintaining the same in general horizontal relation while said cover sections are opening upwardly and counter-balancing means acting on said intermediate cover section.

9. A whirler comprising a tub having a back cover section at the back of the same, an inter mediate cover section hinged on top of said back cover section and arranged to swing upwardly, a front cover section hinged to the under side of said intermediate cover section and arranged to swing downwardly as the cover sections open upwardly, linkage connected with said front cover section for maintaining the same in general horizontal relation While said cover sections are opening upwardly and counter-balancing means acting on said intermediate cover section, including a lever extending from said intermediate cover section rearwardly of the hinge thereof and a counterweight on the rearwardly extended end of said lever.

CHARLES ZARKIN. BERNARD R. HALPERN.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 203,106 Berry Apr. 30, 1878 643,606 Rebbeck Feb. 13, 1900 924,686 McCloud June 15, 1909 1,147,033 Maloney July 20, 1915 1,195,481 Legat et a1. Aug, 22, 1916 1,234,072 Northover July 17, 1917 1,247,058 Zifferer Nov. 20, 1917 1,431,288 Corder Oct. 10, 1922 1,691,160 Meuttman Nov. 13, 1928 1,751,946 Prothers Mar. 25, 1930 2,121,395 Cooper June 21, 1938 2,214,229 Frasch Sept. 10, 1940 2,347,770 DAutremont May 2, 1944 2,356,946 Powers Aug. 29, 1944