US1251158A - Form-roller. - Google Patents

Description

H. A. W. WOOD.

FORM ROLLER.

APPLICATION FILED DECIU, I910. RENEWED MAR. I4. 1917- 1,251,158. I Patented Dec. 5,191

727mm W756i 7%. a. vhf/aw $6? M s UNITED STATES PATENT OFFICE.

HENRY A. WISE WOOD, OF NEW YORK, N. Y., ASSIGNOR, BY MESNE ASSIGNMENTS, TO

WOOD NEWSPAPER MACHINERY CORPORATION, OF NEW YORK, N. Y., A CORPORA- TION OF VIRGINIA.

FORM-ROLLER.

Patented Dec. 25, 1917.

Application filed December 17, 1910, Serial No. 597,891. Renewed March 14, 1917. Serial No. 154,872.

To all whom it may concern:

Be it known that I, HENRY A. WISE WOOD, a citizen of the United States, resida new and useful F orm-Roller, of which the following is a specification.

This invention relates to form inking rollers.

The principal objects of the invention are to provide a construction thereof which will be more durable than the present form rollers, especially when used on high speed machines, and yet will be capable of inking printing forms of all kinds; even when operated at a very high speed, and also to provide a construction in which the interior of the roll can be cooled or heated if desired. Further objects and advantages of the invention will appear hereinafter.

Reference is to be had to the accompanying drawing, in which- Figure 1 is a longitudinal central sectional View of a portion of a form inking roller constructed in accordance with this invention, and

Fig. 2 is a partial sectional View of the same on the line 22 of Fig. 1.

As is well understood, form inking rollers are now composed of a core and a shell thereon of printers composition, usually composed of glue, molasses and glycerin, or other ingredients of a similar nature. These form rollers for news aper presses are usually'six inches in diameter and the shell of composition is about three-quarters of an inch thick, being of a uniform mixture throughout. It is cast upon the core at a single operation. As the printing forms to which the form inking roller conveys the ink from a metal supply roller or plate are extremely delicate, it is necessary that the surface of the form roller be sufficiently soft to avoid damaging the form, and 1t must be elastic in order that it may reach and apply ink to the various heights of the form. Forms, as is Well known, are made up of linotype matter, or type and cuts in such a way that the surface of the various parts are seldom, if ever, uniform in height. Therefore the elasticity and softness are absolutely necessary requirements.

Printers composition, which has been found to be the most suitable substance for this purpose melts at a comparatively low 1ng at New York, in the county of New York and State of New York, have invented temperature and on account of its glycerin, becomes soft and mushy in a moist atmosphere. Therefore when a high degree of heat and moisture are present trouble always results 1n newspaper printing ofiices from the burstingof the form rollers. The faster a press is run the more quickly do the form rollers heat and burst. This fact threatens with failure the attempts which are now bemg made to produce printing machines of greater speed. So far as I am aware, the only attempt that has been made to lessen this ditficulty is to make thedistributing rollers, where they are concerned, of as hard printers composition as is' possible, while the form rollers still must be made of soft cgrlnposition in order to be sufficiently. plia e.

The purpose of this invention is to provide a form roller which Without reducing the usual thickness of its composition shell shall nevertheless be so made that upon the core it shall have a base of composition of suflicient hardness to withstand the above mentioned difliculties even when the presses are run at a much higher speed than is now usual, and yet shall have necessary softness and elasticity at its surface. In order to accomplish this I provide a core A which may be of any usual form, such as a pipe, or shaft, or a shaft covered with wood, but in the present case it may be somewhat modified as Will be explained hereinafter.

Upon this core is cast a homogenous shell or layer B of printers composition made in the usual way,-except that. it contains a larger proportion of its harder ingredients such as glue, and a smaller proportion of the others, as molasses and glycerin, for example, so that it is considerably harder than any shell that is used at the present time for this purpose, being practically as hard as the shells of the distributing rollers mentioned above. When this shell has become set an external layer or shell C of relatively soft homogeneous printers composition is cast upon it, this layer being of th usual composition so as to have all the necessary softness and elasticity. Each of these layers is cylindrical and extends substantially the whole length of the core as indicated in the drawing. If desired the outer layer can be cast on the inner layer while it is still warm, so that the two layers will form a homogeneous union at their meeting surfaces. This'causes them to cohere, so that neither layer can burst unless the whole shell becomes way it will be seen that on account of the high melting point of the inner shell, the trouble from the bursting of the printing rolls is reduced to a minimum as t 1e outer shell cannot burst independently of the inner one, and that will standmuch more severe use and much higher temperature than the outer shell or any shell now in use.

The relative thickness of the two shells may be varied within certain limits, but for ordinary uses I prefer to have the inner shell about twice as thick as the outer shell, that is, about one-half inch, while the outer shell is about one-quarter of an inch. This materially reduces the thickness, and thus the weight of the more sensitive composition, so that its tendency to lose its shape or to burst is brought down to a minimum. In cases where the machine is to operate at a very high speed the thickness of the outer soft composition is still further reduced and in extreme cases brought down to a mere kin.

Another feature of the invention is the making of the core A hollow, by providing it with an interior air-tight chamber a and providing its journals a with passages a therethrough, one for the introduction of a cooling fluid, and the other for its discharge.

disrupted. In this This assists materially in accomplishing the other obJects of the inventionspecified above, as by this means the interior of the core can be cooled, and thus the temperatur of the composition shell reduced. If desired this construction of the core can be utilized for the purpose of introducing steam and the like for heating the core, but I prefer to introduce air or water for the purpose of cooling it.

As has been stated this hollow construction can be used either for heating or cooling the roll. When used for heating the roll it results in softening up the ink when the machine starts so that it can be started much more rapidly and with the expenditure of less power. As the interior of the roll is much harder than has been the case heretofore, this heating can be carried on to a higher degree than could have been the case with the ordinary form rollers, which are of the same hardness throughout.

While I have illustrated and described a preferred embodiment of the invention, I am aware that many modifications can be made therein by any person skilled in the art Without departing from the scope of the invention as expressed in the claims. Therefore, I do not wish to be limited to all the details of construction herein shown and described, but what I do claim is 1. As an article of manufacture, a form inking roller comprising a c lindrical core, a cylindrical homogeneous layer of roller composition containing a material to render it soft and a relatively large proportion of a material to render it hard, and surrounding the core from end to end, and of substantially uniform thickness throughout, and a distinct outside cylindrical homogeneous layer of the roller composition containing a relatively large proportion of the material for the purpose of making it soft, cohering to the first named cylindrical layer and surrounding the same from end to end.

2. As an article of manufacture, a form inking roller comprising a hollow cylindrical core having a large chamber inside for retaining a large amount of fluid, and means for the introduction of a fluid, a cylindrical layer of relatively hard printers composition surrounding the same, and an outside 0 lindrical layer of printers composition of relatively soft character on the hard composition and surrounding the same, the inner layer of composition being not less than twice as thick as the outside one.-

In testimony whereof I have hereunto set my hand, in the presence of two subscribing HENRY A. WISE WOOD.

Witnesses:

Maser. M. Gmssur, BLODWEN Jonas.

. witnesses.

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