US1064052A - Method of producing stereotype printing-plates. - Google Patents

Description

A. L. CASE. METHOD OF PRODUCING STEREOTYPE PRINTING PLATES. AIYLIOATION FILED DEG.27,1907.

Patented June 10, 19 13.

/ INVENTIOR Arthur .L Case- Fig: 6

ATTORNEY ARTHUR L. CASE, OF PLAINFIELD, NEW JERSEY.

METHOD OF PRODUCING STEREOTYPE PRINTING-PLATES.

aura-one.

Specification of Letters Patent.

:rt'cintcd June 10. I913.

itpptieatton filed December 27, 1907. Serial No. 408,282.

Be it ltnown that l. Airmen L. (lxsa, a citizen of the l mited States of America. and a resident of Plaintiiiltl, Union county. New Jersey, have invented certain new and useful improvements in Methods of Producing Stereotype Printing-Plates,of \vhioh the following is a specification;

The present invention relatcsto stereotype printing plates and to the method of produeing the same.

In the prior art; of stereotyping it has been customaryto cast the plate in an open or non iincloscd casting chamber, thereby pro- (lacing a plate having considerable overcast. This plate has to be trimmed and the surplus metal removed.

The object of this invention is to obviate the necessity of trimming the plate after it is cast. This is elleet'ed by originally casting the plate to its required length and devoid of overcast.

In the accompanying drawings is shown a preferred form of an apparl'itus for carrying out the invention. This apparatus is not claimed herein lmtfor ns the subject matter of an application tiled by me on the l-t-th of March 1907 Serial No. 362,343.

In the said drawings: l igure l is a side view in elevation, partly broken away and in section, of a stereotype casting machine for carrying out the invcnt'ion. Fig. is a detail view partly in section of one of the head gages. Fig. 3 is a perspective view of the valve for regulating the admission of metal to the casting chamber. Fig. t is a perspective view of toy improved stereotypc printing plate. Fig. 5 is a transverse scctional view through the cope and drag on the line 5---5 ol Fig. 1. Fig. (3 is a sectional view on the line 6 6 of Fig. .2.

Similar characters of rct'crence indicate corresponding parts in the dill'crcnt views.

' 1 indicates a metal Inciting furnace of any usual or suitable structure and provided with the melting pot 2. Located adjacent to this metal melting furnace is in this instance an upright stereotype casting mold. indicated by it. The casting mold is composed of two parts, a stationary part. hcrc called the drag and indicated by l. and a movable part, here eallcd the copc, indicated by 5. The stationary part can convhnicntly be placed with the back against the metal melting furnace and is secured thcrclo by any suitable means, as the bolts (i. The means for moving the cope toward and away from the drug may be of any suitable construction. lo the present instance. the ccpe is hinged at its lower end by mcans of the pivot 7 and maybe provided with the operating handle 3.

The casting chamber 9 is substantially of the contour and dimensions of the plate to be cast being incloscd by the cope and drag, by two side gages 9 and by the lower and upper head gages indicated respectively by 10 and ll, the said head gages being beveled in opposite directions as shown.

Suitable means of connnunication from the pot to the casting chamber are provided. The particular form here followed consists of a duct 12 leading from the pot and extending downwardly within the metal melting furnace, and outwardly to the exterior thereof where it communicates with a borizontal passage 13 in the lower end of the drag which l-ads into the casting chamber. This passage 13 is snrroumled by an air space 14 which separates it from or renders it free from contact with the usuahwater back l5. so that the water in the latter will not tend to cool the metal before it enters the casting chamber. ll desired, some auxiliary heating means. as the gas jets 16 may be utilized to heat the passagc t3.

17. indicates a valve for regulating the admission of the molten metal into the casting chamber. This valve consists of two plates to ol sheet metal. between which is interposed a body ot asbcstos'or the like. It is normally held in its closed position by means of the spring 15) and is opcncd by means of the lever 20 and connections 21 and 22.

shown.

2:3 for allowing the air to csca )e as the casting chamber is tilted. This valve is providcd with a slbt Q-l in which plays a snit able stop 25 cal ricd by the. gage so that the valve by its own weight is normally 0 en. The rise-of the molten metal serves to c ose the valve in its seal it; by reason of the complemcntary tapcred surfaces in the valve and seat, and when so closed it forms a part oi the wall of the casting chamber, the said valve being bevclcd to correspond to the bevel ol. the gage. A signal or iiulicator 97 an convcnicnlly bc;carricd by this valve l the mold when the latter is full.

Located in the u )er hcad age is a valve and will be caus d to rise or project outside \Vhcn this valve is closed itv forms a part of the wall of the casting chamber as The plate shown in Fig. 4 is the-product of the lnethod employed in originally cast ing the plate to its required length. The said plate 50 is characterized by the fact that it is originally devoid of overcast and is originally surfaces 51 at its upper and lower ends. What is claimed is:

1. The method of producinga stereotype printing plate or other article which is initially devoid of overcast,- consisti'ng in {lowing molten metal into a casting chamber of the proper-size and contour-of the plate to be cast, allowing the air to escape from the casting chamber as it is displaced by the metal entering the chamber, 'and finally, when the casting chamber is completely filled with molten metal, closing a'nd'sealing oil the castinglchamber both at the point of entrance of metal and the point of exit of an. 4 v

Ihe method o producing 'a stereotype printing plate initially devoid of overcast, Wll'lClLCOllSlStS in flowing by gravity molten metal into a casting chamber of tbecproper size and contour ot the plate to be cast, al-- lowing the air to escape from the casting chamber as it s displaced by the metal entering the chamber, and

formed with oppositely beveled.

casting chamber is completely filled with molten metal, closing and casting chamber both at the point trance of metaland the point of exitot air,

3. The process of producing a stereotype rintin )late ori inall free of overcast a: a: a

which consists in flowing molten metal into the lower end of a substantially upright casting chamber, permitting the air to escape from the upper portion of the as it is displaced by the. entering molten metal, closing of? the air outlet as'the chamber becomes completely filled with metal, and, after the chamber has been completely filled with metal-,rlosing oil the inlet in the bottom portion of the chamber at the point 4 of entry into the chamber,

molten metal completely filling a closed easting chamber of the required produce perfect printing overcast.

Signed at New York citythis Qtth day of December, 1907.

ARTHUR L. CASE.

Witnesses:

Anna V. BEEKEB. Geo. A0 Manet-1min.

finally, when the.

whereby the i dimensions, will plate devoid of sealing oft the of enchamber

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