Патент USA US2116711код для вставки
May 10, 1938. F_ T, POWERS 2,116,711 COOLER Filed Sept. 29, 1936 - 6 /I4/ “Z '4 7 2I /2 -lo_. j ' 1 Frank Tpou/ars. ' INVENTOR BY A ORNEY / Patented May 10, 1938 2,116,711 UNITED STATES PATENT OFFICE 2,116,711 COOLER Frank T. Powers, Glen Cove, N. Y. Application September 29, 1936, Serial No. 103,084 2 Claims. 1 My invention relates to the art of photo en graving and more particularly to a device for lowered. cooling photo-mechanical printing plates during Within the tray 1, and attached to the top of cylinder 4, is a cylindrical chamber 16 having ports I’! in its side covered by ?exible ?aps l8 permitting ingress of water from tray 1 Whenever the process of etching. 5 ‘ The objects of my invention are to provide an apparatus of improved working qualities, free from some of the short-comings and defects pres ent in apparatus heretofore used for this pur pose. 10 (01. 62-11) raised, and permitting ingress of air when it is To accomplish these and other objects, which will in part be mentioned hereinafter, part will be obvious from the following description and part may be learned by practice with the inven tion by one skilled in the art. I have invented 15 a device of Which the following description, taken _ the pressure is greater on the outside of chamber 16 than it is within, and preventing movement of water through the ports in the opposite direc tion. Chamber I6 is divided into two compart 10 ments I61; and I612‘ by a partition 23, the lower compartment 16a of the chamber being markedly larger than the upper compartment I61). Attached to the partition 23 of chamber 16 is a tube I9 permitting egress of water from cham together with the accompanying drawing, will ber l6a into compartment lab. Above chamber enable one skilled in the art to make and use the invention. The drawing shows one embodiment of the in 20 vention which is given as an example but is not I61), and attached to ?ange 20 is a stage 2| for supporting the plate to be cooled, which has per to be taken as restrictive thereto as variations in structure may be made within the spirit of the invention and the scope of the appended claims. It will be obvious, for example, that the 25 foot operated air pump, described and shown in the drawing, may be replaced by a hand operated pump, or that air under pressure may be sup plied from any available source, without depart?‘ ing from the spirit of the invention. ‘ 30 The drawing shows a vertical section of the de vice near a center line. In the drawing I is a tray of suitable material such as metal which is supported by a frame consisting of four legs 2 and a cross brace 3. At 35 tached to said tray is an air pump comprising a cylinder 4, within which a piston 5, having a cup washer 6 attached to its upper surface, is adapted to be moved vertically by means of a piston rod 1 actuated by a foot pedal lever 8, 40 the fulcrum 9 of which is attached to the cross brace 3. The piston rod is guided in its motion by an opening in the pipe cap 10 on a short nipple H screwed into an opening in cross brace , 3, a collar 12 pinned to rod 1 is so positioned 4” on the rod 1 as to properly limit the downward travel of the piston 5. The piston 5 has one or more ports l3 cov ered with ?exible ?aps 14 to permit ingress of 50 air as the piston is lowered from an upper posi tion to a lower position and to prevent escape 15 forations 22 in that area which is within the ?ange. The stage 2| is smaller than the tray I. The method of operation of the machine is as follows: The tray is ?lled with water approxi mately to the level indicated by the dotted line 24 and enters the lower compartment of chamber 0 16 through ports I‘! until the water level is the same within the chamber 16 as in the tray I. A photoengraving plate, or other object to be cooled, is placed upon the stage 2| with its cen tral portion over the perforations 22, pedal 8 is pressed by the foot of the operator which moves rod 1 and piston head 5 upward, forcing air thru the pipe 15 into the lower compartment of cham ber 16. When the air pressure in chamber [6, in the space above the water reaches a suf ficient amount, the water is forced upward through tube I9 into the upper compartment of chamber l6 until it is ?lled and ?uid then emerges through perforations 22 in stage 2|, and against the under side of the plate being cooled, which is reposing thereon. ~10 The force of the water upward slightly elevates the plate being cooled above the perforated stage 21 and cooling ?uid ?ows outwardly from the center toward the edges of stage, cooling said plate rapidly and evenly. Even though the plate being cooled may be somewhat buckled, warped or bent, as it sometimes is, and consequently does not lie ?at and in contact throughout its area with the perforated stage 2|, the volume of water rushing through the perforations 22 is sufficient 50 to reach and cool the entire plate almost in of air through the ports when the piston is moved stantly. upwardly. Upon the downward or return stroke of the pis ton 5, air is admitted to the cylinder 4 through the ports l3 and also from chamber l6 through 55 \ Attached to the top of cylinder 4 is a pipe riser 55 I5 providing egress for air when the piston 5 is 2 ~ 2,116,711 pipe riser l5 as the water from tray l enters chamber through ports I‘! displacing the air therein. If necessary several successive strokes of the piston 5 may be used to force the desired quan tity of water through the perforations 22. Having described my invention I now state what I believe to be new and novel and for which I pray that Letters Patent be granted. 10 Iclaim: 1. In a device for cooling photo-rmechanical printing plates in the process of etching such plates, the combination of a receptacle for a cool partment and out through the perforations in said stage and against the under side of a plate to be cooled reposing thereon. 2. A device for cooling photo-mechanical printing plates, in the process of etching such plates, the combination of a receptacle for cool ing ?uid, a double chamber having upper and lower compartments within said receptacle, hav ing check valves adapted to admit cooling ?uid from said receptacle into the lower compartment 10 of ‘said chamber, a tubular‘ passage from the lower portion Iofi'the lower-compartment of said chamber to the'upper compartment thereof, a. ing ?uid, a double chamber having check valvesd ‘perforated stage forming the cover of the upper compartment of said chamber, and an air pump 15 tacle into the lower compartment of said cham-“ adjacent to and communicating with said lower her, a tubular passage from the lower portion of compartment of said chamber, whereby air the lower compartment of said chamber to thev under pressure may be discharged into said com upper compartment thereof, a perforated stage" partment‘ thereby ‘displacing cooling ?uid in said compartment and causing said ?uid to ?ow into 20 20 forming the cover of the upper compartment .of said chamber, means for discharging air under said upper compartment and out through the pressure into the lower compartment thereby dis :p'erforations'in said ‘stage and against'the'under placing cooling ?uid in said compartment and side-of a plate to be cooled reposing thereon. 15 adapted to admit cooling ?uid from said recep--_ causing said ?uid to ?ow into said upper com - ' FRANK '_I_'i POWERS.