US280447A - Andrew campbell - Google Patents

Description

(No Model.)

A. CAMPBELL. PRINTBRS INKING AND DISTRIBUTINGROLLER.

NO. 280,447. Patented July 3, 1883.

Fig: 2

v INVENTOR: WITNESSES. "$4 t N. PETERS. MW. W 0. c.

UNITED STATES PATENT OFFICE.

ANDREIV CAMPBELL, OF BROOKLYN, ASSIGNOR TO JOHN MOLOUGHLTN AND EDMUND MOLOUGHLIN, OF NEV YORK, IT. Y.

PRINTERS INKING AN D DISTRIBUTING ROLLER.

SPECIFICATION forming part of Letters Patent No. 280,447, dated July 3, 1888,

Application filed December 14, 1882.

To all whom it may concern:

Be it known that I, ANDREW CAMPBELL, a citizen of the United States, residing in Brooklyn, Kings county, New York, have invented certain Improvements in Printers Inking and Distributing Rollers, of which the following is a specification.

This invention relates to a roller for inking forms, whether 011 stone or in type, and also for distributing the ink for the form-rollers. It is intended to take the place of the ordinary leather and composition rollers used for these purposes.

The ordinary composition-rollers, molded 1 from a compound of glue and a sacharine substance, have many objectionable features, arising partly from their susceptibility to changes of temperature and hygrometric changes, and partly from failure to properly perform their functions, even under the best conditions. N otwithstanding these defects,h0wever, such composition-rollers have, up to this date, served the purposes of the printer in general better than any other class of rollers, so far as I am 2 5 aware. The compound leather and rubber rollers proposed for printers use have also many objectionable features, which I seek to avoid in my herein-described roller, which belongs to this class. My object is to provide a light roller with a flexible, uniform, and elastic surface, and free from the various defects inherent in the rollers in ordinary use.

For the stock of my roller, I prefer to em ploy a metal cylinder which may be solid or 5 hollow. Around this I tightly wrap a sheet of fabric, preferably linen or muslin, covered on one or both sides with soft india-rubber prepared for vulcanization, or some rubber compound of ayielding character. This wrapping is continued until the proper thickness is attainedsay one-fourth of an inch, or less. Over this I apply a uniformly thick layer of soft rubber or rubber compound prepared for vulcanization to serve as a cushion. Over. 5 this cushion I wrap one or more thicknesses of some fabric, preferably fine wire-gauze or strong linen. enough. Over this wrapping I apply another layer of rubber or rubber composition prepared for vulcanization. This layer need not be p the facing layer of rubber. One thickness will usually be (No model.)

so thick as the cushion-layer, as it is intended for a facing layer. The core thus formed is now subjected to the usual process of vulcanization, whereby the rubber is hardened to the proper degree, and all the layers and wrap- 5 5 pings are firmly cemented together. I now true up the core by dressing or grinding off the surface of the exterior vulcanized layer until it is perfectlycylindrical and true on the spindles or bearings of its stock, and has a perfectly true surface. I now cover the core with some thing, substance, or composition that will protect the rubber of the roller from the action of the oils and solvents found in printer sink. 4 For this purpose Imay employ several methods. I may cover the roller with a sheet of tissue-paper saturated with paraffine; or I may coat it with a varnish that will resist the solvents in the ink; or I may japan it as metals are japanned. I prefer, however, to first coat it with such japan as is employed in the manufacture of patent-leather. Then,

before the japan is dry, I wrap the roller with a single layer of fine linen or muslin. Then I apply another coat of japan, and, before itis 7 5 dry,.slip on the final covering of leather, which forms the exterior surface of the finished roll er. The roller thus prepared is then carefully stoved to bake the japan, and the leather will be found firmly fixed in place. The japan will effectually protect the rubber from the solvents in the ink. I may omit the textile or other fabric, and rely wholly upon the japan.

In the drawings which serve to illustrate my invention, Figure 1 is a longitudinal mid section of a portion of a roller constructed according to my invention, and Fig. 2 is a crosssection of the same; 1

I have not deemed it necessary to show the endsof the roller, as they may be constructed 0 in the usual or any good way.

A is the cylindrical stock. B is the wrapping of rubber-covered fabric. O is the rubber cushion layer- D is the wrapping of gauze, linen, or other similar material. E is F is the interposed protecting film or covering, and G is the exterior leather covering.

I prefer to employ for the leather covering G a leather that has been thoroughly tanned 10o by a slow process, and which is about oneeighth of an inch in thickness when shaved and finished. The hair or grain side of the leather is arranged outwardly to receive the ink, by preference; but either side maybe an ranged exteriorly. This leather is uniformly flexible, and is especially suited to my purposes.

The object of the gauze or textile'layer Dis to give the roller that rigidity which prevents distortion from its true cylindrical formwhen rolling over the type or stone,and prevents the creeping due to the expanding by pressure of the part of the roller in contact with the form. At the same time it does not impair the elasticity of the roller.

I may in some :ases omit the wrapping I from the stock and apply the cushion of rubher directly to the same; or I may substitute a wrapping of some other kind'as covered wire, for example. The purpose of this wrapping is to give to the cushion a firmer hold on the stock and prevcntit from tearing loose, as it is liable to do where the cushion is applied to the stock.

The leather covering of the roller, when applied with japan and baked, forms substantially one with the core of the roller, and this means of attachment may be employed with rollers having cores constructed differently from that herein described.

By rubber compounds, I mean compounds of an elastic or yieldingnature of which rubber forms a part. Many compounds of this nature are well known inv the arts.

Having thus described my invention, I claim 1. A roller to be employed in printing for applying and distributing ink, comprising a stock, a cushion of rubber or its specified equivalent on said stock, a textile covering over said cushion, a facing layer of rubber or its specified equivalent over said textile covering, an interposed lilm orsubstance, substantially as described, to protect the rubber from the solvents in the ink, and an exterior covering of leather, all constructed and arranged substantially as set forth.

2. A roller for use in printing, having a core with a rubber face, and an exterior covering ofleather, and an interposed layer of japan between the rubber facing and the leather, said japan being baked in the usual way to form a n'otectingshield to prevent the solvents inthcink frominjuring the rubber, substantially as set forth.

3. The combination, to form a roller for use in printing, of a core, A, a wrapping, B, a cushion of rubber, (l, a textile covering, 1), a rubber facing layer, E, an interposed protecting-covering, F, for the facing, constructed and applied substantially as described, and an exterior covering of leather, G, all arranged substantially as described.

4. A roller for printers use, comprising a stock, a rubber cushion or core, a leather cover, and a layer of cement between the rubber and the leather, which will not be affected by the ink, whereby the said rubber is protected against injury from the ink, substantially as set forth.

In witness whereof I have hereunto signed my name in the presence of two subscribing witnesses.

ANDREW CA MPBELL.

\Vitnesses:

1'). E. lhnnnrr, A. It. HIT/Lynn.

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