US780328A - Composition for cleaning plate-printing presses. - Google Patents

Description

,UTED STATES Patented January 17, 1965.

PATENT OFFICE.

THOMAS R. DEMERY AND GEORGE W. SOHOOLEY, OF HARRISBURG, PENNSYLVANIA.

COMPOSITION FOR CLEANING PLATE-PRINTING PRESSES.

SPECIFICATION forming part of Letters Patent No. 780,328, dated January 1'7, 1905.

Application filed October 15,1904- Serial No. 228,617.

T0 (all 1.0710771, it may concern.-

Be it known that we, THOMAS R. DEMERY and GEORGE Y. SoHooLEY, citizens of the United States, residing at Harrisburg, in the county of Dauphin and State of Pennsylvania, have invented new and useful Improvements in Compositions for Cleaning Plate-Printing Presses, of which the following is a specification.

Our invention relates to improvements in compounds particularly designed for cleaning or polishing purposes in connection with plate-printing presses.

It has for its object to polish the plates in course of printing with preferably a rag or like suitable means treated to the compound, thus obviating the slow and somewhat diflicult manner of effecting the polishing operation with the palm of the hand with what is termed whiting.

Said invention consists of the ingredients compounded in the proportions and the manner substantially as hereinafter more fully disclosed, and particularly pointed out by the claims.

In the practicing of our invention we take one (1) quart of spirits of ammonia and add thereto a quarter (9;) of an ounce of carbonate of potash, three-quarters (2-) of an ounce of camphorated oil, three quarters of an ounce of oil of sassafras, and four L) ounces of clear starch, the same readily amalgamating, as will be appreciated. For the treatment of copper plates we use one-half (t) ounce of carbonate of potash instead of onequarter (a) of an ounce thereof.

A piece of what may be called cheesecloth or other suitable material is first used as a Wiper for the removal of surplus ink from the surface of the plate. A second piece of like or other suitable material is moistened or saturated. with the compound and passed or rubbed over the entire surface of the plate, effectively cleaning said surface without disturbing or affecting the ink in the engraving. 1t isalso noted that in applying our cleaning compound the rag or other vehicle employed therefor, although having absorbed from previous wipings considerable quantities of ink, will continue to be serviceable for effecting subsequent Wipings or without depositing ink upon the subsequently-wiped plate-surfaces, thus overcoming the otherwise impractical character of the same, as would be the case were it necessary to renew the rag for each wiping or cleaning. It is further noted that care should be taken to have the applying or wiping rag or vehicle no more than damp or have it free from excess of moisture. Otherwise such excess would be deposited upon the plate-surface, which would result in a soiled sheet.

We claim- 1. The herein-described composition of matter, consisting of spirits of ammonia, carbonate of potash, camphorated oil, oil of sassafras, and starch, substantially as described and for the purpose described.

2. The herein-described composition of matter consisting of spirits ofa1n1nonia,one quart; carbonate of potash, quarter of an ounce; camphorated oil, three-quarters of an ounce; oil of Sassafras, three-quarters of an ounce; and starch, four ounces, substantially as described.

In testimony whereof we aflix our signatures in presence of two subscribing witnesses.

THOMAS R. DEMERY. GEORGE W. SCHOOLEY. Witnesses:

AMEDEO BRANK, Geo. A. HovER'rER.