US1560640A - Cooling machine - Google Patents

Description

Nav. 10,1925. l 1,560,640

' A. H. ANTZ cooLING- MACHINE Filed Nov. 13, 1924 HTORNEx/s.

Patented Nov. 10, 1925.

UNITED STATES vPATENT ALBERT II. ANTz, OF SAN FRANCISCOQCALIFORNIA, AssIGNoRfTo SIERRA 'ART a" nNeRAvINo Co., or sAN `I.RANCIsCO, CALIFORNIA, A CORPORATION onCALI-fy FOBNIA,

COOLING MACHINE.

Application 1ed November 13, 17924. Serial No. 749,719.

To all whom t may concern:

Be it known that I, ALBERT H. AN'rz, a citizen of the United States, and a resident of San Francisco, county of San-Francisco, State of California., have invented a new and useful Cooling Machine, of which the following is a specification.

My invention relates to cooling machines for use in the process of engraving.

In what is called theburning-in step of an etching process, it is commonA and wellv known in the art to subject the plate to be etc-hed successively to the action of heat in time with the process of brushing the plate with an acid resistant, commonly called dragons blood, and to successively' cause, if the etched side is touched by they Water, even a small drop will spot the plate and necessitate costly and laborious treatment to restore the plate to its intended form. Cooling rolls over which the bottom side of the plate .is passed are horizontally' mounted on a table or stand and as the plates are frequently large and heavy and passed over the rolls at a tangent thereto, the plate is liable to buckle. Particularly in the production of color plates this distorts the plateand sometimes renders same valueless.

It is an object of my invention to provide a cooling machine which satisfactorily overcomes the objections heretofore existing in the art, and to provide means to eliminate buckling of the plate and unequal contraction due to unequal cooling and for avoiding the use of water in the cooling step or treatment, whereby the plate is dry at all times.

A further object of the invention is to provide a cooling machine where the air is employed as a cooling agent for the plate, and my invention makes use of a structure and coacting instrumentalities wherebyv the f full force and effect of the air is spent against both sides of the plate, augmentingv the cooling process and enabling' same to be carried on with dispatch and ina manner that will enable an operator to heatv and brush one plate while another is1v being..

treated to a cooling action.

Other features of novelty and utility willy obviously appear upon reference to the accompanying drawings y and description, wherein Y i Figure l4 is a plan view of my improved cooler with parts broken away for the purpose of clearness, and f Figure 2 1s a side elevation thereof.

In carrying my invention intopractice,A

use is made of an Yupper truncated concor pyramid-like section 5, and a lower truncated cone or pyramid-like section 6, the latterarranged directly under or in vertical alinenient with the former so that the respective small ends of bothsections are on a common line drawn vertically through the complete structure. The :large ends of the sections 5 and 6 are brought` almost to-` getherV and are joined to one another by a` skirt or angular wall 7, and in one part of which is a swinging' door 8. :The doory may be turned on its mounting by meansof a manually actuated crank handle 9. When tilted in onedirectiornaccess` may be had to` the double truncated receptacle or chamber deiinedby the two sections 5 'and 6. When closed, the door serves to cover what I shall call the open side 'of the. chamber. o'

Behind the door 8 and supported inv thev structure at its pointof 'maximum diam-r eter are spaced apart bars or supportsr, 4on which the metal plate to` be treated.l is adapted to rest in a horizontal position. These bars hold the plate l'latwise.k :They

equally sustain the weight of the platesoV that itis impossible `for the platev to buckle.

- The ytwo sections 5 and 6 are supported upon a vertical frame l() having a base Aplat form l1. A motor driven blower is conventionally illustrated at l2, and the duct 13 thereof makes connection with the small end of the section 6 so that a blast of air will be impelled into the section 6 below the bars 8a where it will be brought into direct impingenient with the bottom side metal plate.

vof the los A metal plate under course of treatment is shown at A, and as the combined horizontal area of same is less than the combinedy horizontal area of the space boundedk by the wallsof the aforesaid skirt 7, it follows that passage-ways are formed between the. edges of the plate and the inner surfaces of said skirt. It consequently happens that an air lane created in the entire structure is intercepted by the supported metal plate ini its course of treatment, and that the full force fand cooling effect of the air is first applied and made to impinge against the bottom side of the metal plate.

The air, in seeking its escape from the lower section 6 of the structure, is forced upwardly past the edges of the -plate and is finally buifeted by the angular walls of the upper section 5. At this time, the air is still at a relatively low temperature and same possesses good cooling qualities. The final discharge of the air is edected bythe outlet 45' on account of its given form acts to.

the source of air discharge.

at the top of section 5, but the outlet being constricted as compared with the internal area of said section 5, causes deflection of the air over the top of the metal plate and vsame is accordingly' utilized as an effective cooling. agent.

In effect, I create a lane of cool air and intercept same by` positioning a hot metal Yplate between the source of air intake and I cause the intercepted air to impinge againstboth sides ofthe plate while constantly inducing a cooling draft within the structure.

It is found in practice that the top section squeeze the air as it flows in anv upward drection past the edges of the plate A and I thereby cause radial defiection of the air across'the top of the plate. This results in a final cooling of the plate with great rapid against the other side thereof, one side receiving a fresh blast of air at low temperature and from which said side the air isconstricted in its discharge and then finally permitted to pass over the top of the plate, where its discharge/ is further constricted while the airis still at a low temperature.

I have described' specifically' a chamber of substantially double truncated form, as I find from practicethat very satisfactory results can be obtained therefrom. However, it shall be understood that I do not wish to limit myself in respect to the structural details herein exhibited, and that changes within the scope of the hereto annexed claims can be made within the spirit of my invention.

Neither do I wish to limit myself; as to size and kinds of materials employed, but

in this respect it shall be remembered that a plate to be treated must be of a size lessv than the maximum size of the cooling'chamber at the point where the .plate rests. This is important in order that proper passage of air from the lower section 6 may be had -at points around the edges ofthe plate from` which the air finally passes to the section 5 to be constricted and buifeted by the walls.

of said section and held substantially vsuperposed with respect tothe etched side of the plate.

plate at some point in the lane and utilizing the air against both sides of the plate is theI feature of novelty with which I am particularly interested whereby the cooling action 1. In a cooling machine of thevclass described, a double truncated cooling chamber, open at one side between its small ends,a closure for said open side,-and means forsupporting a plate in said chamber between said small ends so that air impelled through thc chamber will be intercepted by the plate;

2. In a cooling` machine, a chamber whose internal diameter respectively reduces in two directions from its center, means for supporting a plate in said chamber at the large part thereof, and means for causing an induced air current to flow through said chamber and to be brought into impingement first against one side of the supported plate and then against thel other side thereof.

ALBERT n. ANTz.

Intercepting an air laneby supporting 1v

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