US2345874A - Mechanism for treating freshly printed webs - Google Patents

Description

April 4, 1944.

1 ,IWWW J C. HOLSINGER Filed Nov. 1, 1939 MECHANISM FOR TREATING FRESHLY-PRINTED WEBS NVENTOR BY W v ATTORNEYS improve the appearance of finds useful application in speed webs, and the printed Patented Apr. 4, 1944 2,345,874 MECHANISM FOR TREATING FRESHLY PRINTED WEBS Chester Holsinger, Chicago,

11]., assignor to The Goss Printing Press Company, Chicago, Ill., a.

corporation of Illinoi Application November 1, 1939,Serial No. 302,283 4 Claims. (01. 91-43) The invention relates to new and useful improvements in printing and printing presses, and more particularly it relates to novel and useful .improvements in means for treating freshly printed running webs to prevent offset and to the product.

Objects and advantages of the invention will be set forth in part hereinafter and in part will be obvious herefrom, or may be learned by practice with the invention, the same being realized and attained by means of the instrumentalities aficllm combinations pointed out in the appended c s.

mercial work I have found it advantageous and beneficial to run the bufling surface or surfaces at much higher speed than the web speed, and it is frequently advantageous ,to run the bufling surface at several times the web speed and in the opposite directionas the web. I have also found it advantageous to positively feed the web along The invention consists in the novel parts, constructions, arrangements, combinations and improvements herein shown and described.

The accompanying drawing, referred to herein and constituting a part hereof, illustrate one I embodiment of the invention, and together with serve to explain the principles means for treating freshly-printed webs so us prevent offset, smuttying, muddying of colors, or other marring of the work, and the invention color printing, where successive colors are superimposed, and also when oil inks are used in letter press printing on high webs are thereafter handled in various ways, such as being associated, slit. collated, folded and the like. In addition to prwerving the design from injury, the inven-. tion also enhances the quality and appearance of the work itself.

By my invention fast-running, freshly-printed webs are positively fed under tension, in a wellknown manner, and the freshly-printed surfaces are treated or he powder, as flour, or other side oi the for example soapstone, talc, starch,

web is supported at certain points,

coated with very fine, non-metal-' suitable substances The oppofltea fairly direct or straight-away, though not nec essarily a straight line, path, as contrasted with a sinusoidal or indirect and angular path.

It will be understood that the foregoing general I description and the following detail description as well are exemplary and explanatory but are not restrictive of the invention.

Referring now in detail to the embodiment of the invention illustrated in Figs. 1 and 2, afreshly-printed web 10 is shown being fed under tension by'suitable means, indicated conventionally by driven rolls or spaced apart discs 5 and'G, and having other driving or guiding rolls or spaced apart discs 1 and 8, the web being fed under tension, as is customary, and along a fairly direct, generally convex path. lhe web 10 runs over a plurality of freely rotating supporting rollers M, which engage and support the web on one side thereof. Cooperating with each of the supporting rollers i4 is a cutting roller ll, having a buffing surface, preferaly of fabric, such as plush, flannel, knitted angora or other suitable yieldable material, which may be rotated at high speed without appreciable wear. ,Means are provided for regulating the pressure upon the preferably by freely running rollers, and at the points where so supported the freshly-printed llid coated surface is subjected to boiling action by a device or devices having an dependently of the web driving means, thereby permitting practically any desired amount ordegree of relative movement between the fast running web and the bumng surface. In much comendless fabricsurface. The fabric bufling surface is driven in-' web between each buiilng roller and itssupporting roller, to regulate the buffing action to a nicety, and as here shown each bumng roller is Journaled in suitable adiustableeccentric bearings, indicated generally by It. Means are pro vided for dusting or coating the freshly-printed web, and as shown, comprhe a-feeder having an elongated slotted discharge portion 2! for directing the powder onto, and entirely across, the web, and a suitable positive feed device 22 and a supply hopper 23.

'Means are provided for driving the bufling surfaces independently of the web feed, and in.

accordance with one feature 0: the invention, thebufllng surfaces may be driven at several times the web feed, and the boiling mechanism may be driven from the press or by an independent drive of its own. As here shown, the humus rollers have on-their shafts driving sheaves or pulleys 21, over which runs an endless belt 28, which belt also runs over a driving pulley ll. On the shaft oi. pulley II is a driven belt sheave I, over which runs a belt 3! which also runs over a pulley 32, driven .by a. motor 33.

An enclosing housing "is preferably provided,

and the rollers l4 may be provided with suitable cleaning devices such as scrapers 35.

In the buffing operation, the superfluous powder is removed from the web, and thegweb so treated has a polished or glazed appearance,

which not only improves, the quality of the appearance of the printed page itself, but also has an effect on the printed matter itself in a contrast relationship. In other words, the method of applying powder and thereafter bufllng the same at high speed improves not only the quality of the printed matter, but gives the paper web so treated a finer appearance, as though the web was super-calendered. vA web treated in this mariner is able to pass through the fold-' ing angle bar, drive roller arrangement, cut-oif arrangement without any offset in the signatures, either to the folder mechanisms or in the signatures as they are piled up in the delivery.

The invention in its broader aspects is not limited to the specific mechanisms shown and described but departures may-be made therefrom within the scope of the accompanying claims without departing from the principles of the invention and without sacrificing its chief advantages.

WhatIclaim is:

" 1. A mechanism for treating freshly-printed running webs, including in combination, means for positively feeding a running, freshly-printed web under tension in a generally downwarddirection, a plurality of freely rotating rollers cated along and engaging'theinner surface of said web and supporting and guiding the'we'b in a convex path with its freshly printedside outermost, means'for depositing powdered absorbent material on an outer freshly-printed surface of the running web, a plurality of bufling rollers engaging the outer powdered side-of the printed web and arranged in pairs with said guiding rollers, to press the web between them means for rotatingsaid buiflng rollers at a high speed relative to the web, and means for regulating the pressure between. each .bu'fling roller and its guide roller.

2. A mechanism running webs, including in combination, means for positively feeding a running, freshly-printed for treating freshly-printed webunder tension in a generally downward direction, a plurality of freely rotating rollers located along and supporting the inner surface of said web and supporting and guiding the web in a convex path with its freshly printed side outermost, means for depositing powdered ab-' sorbent material on the outward freshly-printed v surface of the web, a plurality of bufllng rollers arrangement, folding arrangement, and delivery tion, a plurality of freely rotating rollers 10- engaging the outer powdered side of the printed web and arranged in pairs with said guiding rollers, the web being pressed between but not passing around a bumng roller and its support ,ing roller, means for rotating said bumng rollers independently of the web feed, and means for regulating the pressure between each buffing roller and its guide roller.

3. A mechanism for treating freshly-printed running webs,'including in combination, means for directing a running freshly-printed web under tension in a generally downward direccated along and engaging the inner surface of said web and supporting and guiding the web in a convex path with its freshlyprinted side outermost, means for depositing powdered absorbent material onthe outward freshly-printed surface of the web, a plurality of bumng rollers engaging the outer powdered side of theprinted web and arranged in pairs with said guiding rollers, to press the web between them, means for rotating said bufilng rollers independently of .theweb feed, and means for regulating the pressure between each bumng roller and its guide roller.

4. A mechanism for treating freshly-printed running webs,- including in combination, means for positively feeding a running freshly-printed web under tension in a generally downwardl direction, a plurality of freely rotating rollers located along and engaging the inner surface of saidv web and supporting and guiding the web in a convex path with its freshly printed side outermost, means for depositing powdered absorbent material on the outward freshly-printed surface of the web, a plurality of butting rollers engaging the outer powdered side of the printed web and arranged in pairs with said guiding rollers, to press the web between them, and means for rotating said bufling rollers independently of the web feed.

, ,CHESTER HOLSINGER.

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