US279129A

US279129A - Andeew campbell

Info

Publication number: US279129A
Authority: US
Publication date: 1883-06-12
Anticipated expiration: 1900-06-12

Description

(No Model.)

A. CAMPBELL. PAGE CLOTH FOR PRINTING PRBS'SBS. No. 279,129. I Patented June 12,1883.

WITNESSES: INVENTOR:

v UNITED STATES PATENT OFFICE.

ANDREW CAMPBELL, OF BROOKLYN, ASSIGNOR TO JOHN MCLOUGHLIN AND EDMUND MOLOUGHLIN, OF NE\V YORK, N. Y.

FACE-CLOTH FOR PRlNTlNG-PRESSES..

SPECIFICATION forming part of Letters Patent No. 279,129, dated June 12, 1883.

Application filed July 3, 1882.

T all 1071,0121, it may concern:

Be it known that I, AN DREW CAMPBELL, a :itizen of the United States, and a resident of Brooklyn, Kings county, New York, have invented certain Improvements in Face'Cloths for Printing-Presses, of which the following is a specification. 1

This invention relates to what is technically called a face-cloth. "for a printing-press, be-

; ing the sheet which covers the printingsinrtace or blanket, and upon which the paper lies in receiving the impression. My improved face-cloth is adapted to all forms of printingpresses, but is particularly intended for lithographic cylinder-presses, .for reasons that will be given hereinafter. The materials ordinarily employed forthis purpose are too elastic and yielding, and on lithographic cylinderpresses particularly are apt to stretch and gather in folds or wrinkles ahead of the impression. To perform its functions best, a face cloth should be non-elastic and non-yielding in the direction of its length and breadth under ordinary strains, and yet be flexible and durable.

Toproduce a face-cloth fabric of this character is the object of my present invention, which I will now describe.

Between two sheets of muslin or other fibrous o fabric of a similar character suitable for the purpose I insert a sheet of finely-woven wire cloth or gauze, unite the whole with rubber cement, and then calender and vulcanize the fabric. Such a fabric is non-elastic, owing to the series of metallic wires extending both lengthwise and crosswise, and is nevertheless pliable and flexible. It also presents asmooth and uniformly-firm surface for the paper to rest 011 when receiving the impression.

In the drawings which serve to illustrate my invention, Figurel represents a fragment of my improved face-cloth fabric, partly dissected. Fig. 2 is a fragmentary sectional view, illustrating the stretching 'of the faceclothover the blanket on the printing-surface of the cylinder; and Fig. 3 is a diagram designed to illustrate the defect in the ordinary face-cloth which I seek to obviate.

. A represents the face-c1oth as a whole. In

Fig. 1, a a are the exterior fabrics, shown as (No model.)

partly stripped off from the wire-cloth b at one end. V

In Fig. 2, 3 is the printing-surface of the cylinder of a press; 0, the rubber blanket resting thereon and clamped fast with the facecloth A at 0. At the other end a rod, (1, in the end of the face-cloth is connected by straining-bolts c with a straining-bar, f, on the cylinder. This enables the operative to strain the cloth. uniformly.

In Fig. 3 the cockles or wrinkles formed by the stretching of the ordinary face-cloth are shown at w. These press the paper down lightly upon the form in front of the print ing or impression point, and produce the cf 6 feet known as mackle. \Vhen the impression passes off, the sheet contracts to its normal position.

It is not absolutely necessary that the exterior fabrics should be textile; but I. pre 0 fer textile to paper or felted fabrics by rea son of its strength. Nor is it absolutely necessary that the fabrics should be cemented to the gauze with rubber and vulcanizethas other flexible cements might be employed to produce 7 5 more or less satisfactory results. I prefer, however, the construction described.

I do not wish to confine myself to one cloth or sheet only on each side of the gauze or wire cloth, as two or more may be employed. I contemplate also constructing my face-cloth in one with the working-face of the ordinary rubber blanket-that is to say, attached to and forming a part of said blanket, and not separable therefrom.

Having thus described my invention, I claim--- 1. A face-cloth for printing-presses, composed of a sheet of wire-cloth interposed between exteriorsheets of muslin or other simio lar material, and the whole cemented together with a flexiblecement, substantially as set forth.

2. A fabric-for face-cloths for printingpresses, comprising two exterior fabrics, as 5 muslin or other similar material, and an interposed fabric of woven wire, the three cemented together with rubber and vulcanized, as set forth.

3. Thecombination, withthe cylinder of a too wanes printing-press, of a face-cloth composed of a my name in lhe presence of two subscribing sheet of wire-eloth interposed between exte witnesses.

rior sheets of muslin or other similar mat-erial and the said wire-c1oth and exterior fab- 5 rics cemented together with a flexible cement, substantially as set forth.

In witness whereof I have hereunto signed ANDREV CAMPBELL.

YVitnesses HENRY CoNNET'r, ARTHUR C. FRASER,