US2140950A - Inking mechanism for printing rolls - Google Patents

Description

v l Dec. 20, 1938-. J. 1 BLACKLEY l *2,140,950

` Filed Feb. 6, 1937 v 2 Sheets-Sheet l i 5b l 63e if ii.

20, 1938. J. r| BLACKLEY INKING MEGHANISM FOR PRITING ROLLS 2 sheets-sheet 2 Filed Feb. 6, 1937 Patented Dec. 20, 1938 UNITED STATES PATENT oFFicE 2,140,950 INKING MECHANTSM Foa PRINTING ROLLS Application February 6, 1937, Serial No. 124,475

4 Claims.

This invention is an improvement in ink fountains for use in connection with rotary newspaper webgprinting presses. The plate cylindersl of such presses are ordinarily adapted' to carry four-page plates in line, and each perfecting unit is usually adapted to print webs of paper from two to four pages wide, according to the size of the paper desired. When a full width `web is used all the plates on the plate cylinders must be supplied with ink and therefore the ink is supplied from the fountain to the inking mechanism its full width. When a smaller paper is desired, and for example say but three plates are used on the plate i cylinder, then it is desirable to prevent ink being supplied from the ink fountain roll to that portion of the ink distributing means which would ordinarily supply ink to the missing plate, such ink distributing means distributing ink taken from thefountain roll and delivering Vit to the printing plates on the plate cylinder, which apply the ink to the paper.

The principal object of the present invention is to provide a simple and effective means where by when less than the full number of plates is employed on a plate cylinder the portion of ink which would be normally directed to the omitted plate may be out off. My invention provides a simple means for cutting off this portion of the ink supply at the fountain roll.

'Io enable others to understand and use my invention I will eXp-lain the same with reference to the embodiment thereof illustrated in the accompanying drawings, and summarize in the claims the essentials of the invention and novel features of construction andnovel combinations of parts for which protection is desired.

Fig. 1 is an end elevation of an ink fountain and part of the ink distributing means, and an embodiment of my invention applied to the fountain.

Fig.2 is an enlarged sectional view showing the ink cut off device.

Fig. 3 is a top plan view of part of the apparatus.

Fig. 4 is an enlarged detail section.

The ink fountain may be of the usual construction. As shown it comprises a bowl I in which is journaled a fountain roll 2 from which ink may be supplied by a ductor 2a to an ink distributing drum 2b, with which cooperates the usual ink distributing rolls 2c, from ink is supplied by suitable rollers (not shown) to the plates on the plate cylinder; such parts are well known and it is unnecessary to illustrate them.

The ink fountain is provided with a scraper blade indicated at 3 xedly secured between a bar 4 secured to one side of the fountain. The inner end of the blade 3 is adjusted close to the surface of the fountain roll 2, and the blade is adjustable to regulate the film of ink carried by the fountain roll 2 to thevductor 2a. Ordinarily a series of plate adjusting screws 5 are tapped through suitableV openings in the bar 4 and their lower ends engage blade 3 near the inner edge. By turning screws 5 the space between the inner edge of the scraper blade and the periphery of roll 2 can be very nicely adjusted. The parts thus far described are common and will be readily understood.

The screws 5, when manually operated, tend to vary the distance between thescraper and the roll thus regulating the lrn of ink delivered from itr to the other rolls forming the ink distributing system. All of th'ese parts extend across the press practically the maximum width of paper capable of being printed.

The scraper blade 3 is ordinarily made in' one piece, but in my invention I form the Scraper blade 3 in sections equal in number to the number of plates that can be carried by the plate cylinder when plated at full capacity (which in ordinary perfecting press units is four). To the inner side of the bar 4, and above each blade section 3, I attach a slidable bar 6 equal in length to the underlying blade section, said bar being provided with slots 6a through which pass screws 6b, tapped into the bar 4, that guide the bar 6 in its vertical adjustment or movement.

Each bar 6 is provided adjacent its ends and upper side with internal threaded recesses 6c which are engaged by the threaded lower ends 1c of rotatable rods 1, parallel with the fingers 5, and provided with a reduced portion 'la which is rotatably engaged in the head 8a of a stud 8 screwed into the bar 4. The rods 1 may be manually rotated to adjust the bar 6 vertically. And for this purpose the upper ends'of rods 1 may be shaped as desired. As shown they are provided Y with cross-apertures 'ld which can be engaged by a pin to turn the rod 1.

Each bar E is normally raised out of contact with the related blade section 3, but if it should be desired to cut ofi the ink supply at this point the rods 'l are turned to force the bar 6 downward and cause the lower end 6e of the bar 6 to engage the inner end of the related blade section 3 and press the same closely against the periphery of fountain roll 2 (see Fig. 4) so as to cut off the supply of ink to the related part of the ductor, and when the ink supply is so cut off, ink will not be supplied to that portion of the plate cylinder to which a printnig plate is not attached.

As stated, the scraper blade instead of a single piece is made up of sections, each corresponding in length to the width of a printing plate. In a four-page Wide press four blades 3 will be used, each adjustable as above, each blade contacting with the blade next to it so when full four-page width of paper is printed, the scraper blades will be adjusted exactly the same as if the scraper blade was in one piece.

Rotating rods 'I in one direction will move the related bar 6 downward forcing the blade section 3 with which the bar is associated against the fountain roll 2 so closely as will prevent ink being carried past such blade section by the fountain roll. When ink supply is again desired from such cut olf section of the fountain, the bar is drawn up out of contact with the scraper by revolving the rods 1 in the opposite direction, leaving the scraper blades 3 subject to the usual adjustment by screws 5.

I claim:

1. In combination; an ink fountain, a fountain roll, a series of scraper blade sections, and screws for adjusting the said scraper blade sections relative to the fountain roll; a bar slidably mounted above each blade section and between the fountain roll and screws; and a rod rotatably mounted adjacent each slidable bar and having a threaded end engaging with such bar, whereby said bars may be moved into engagement with the inner edge of the related blade section to force said section to cut off the supply of ink from that portion of the fountain roll to the ink distributing means.

2. In combination; an ink fountain having a fountain roll, a series of end to end scraper blade sections each corresponding in length to the width of a printing plate, screws for adjusting the said scraper blade sections relative to the fountain roll; a slidable slotted bar above each blade section and between the fountain roll and the screws, a guide engaging the slot in the bar, a screw engaging said bar and adapted upon rotation thereof to cause it to force the edge of said section into close contact with the periphery of the fountain roll and cut off the supply of ink from that portion of the fountain roll to the ink distributing means.

3. In combination; an ink fountain having a fountain roll, a series of end to end scraper blade sections, a bar above the blade, a series of screws tapped through said bar for adjusting the scraper blade sections relative to the fountain roll; a short slidable bar mounted on said first bar above each blade section and between the fountain roll and screws; guides for said short bars, a screw mounted on said first bar engaging each short bar whereby upon rotation thereof such bar may be moved into or out of engagement with the inner edge of the related blade section to cut off the supply of ink from that portion of the fountain roll to the ink distributing means related to said blade section.

4. In combination; an ink fountain having a fountain roll, a series of end to end scraper blade sections,a bar above the blade, a series of screws tapped through said bar for adjusting the scraper blade sections relative to the fountain roll; a short slidable bar mounted on said iirst bar above each blade section and between the fountain roll and screws; guides for said short bars, and a rotatable rod mounted on said first bar above each short bar and having its lower end threaded and engaging a threaded socket in the adjacent short bar; whereby said short bars may be moved into or out of engagement with the inner edge of the related blade section to cut off the supply of ink from that portion of the fountain roll to the ink distributing means related to said blade section.

JAMES L. BLACKLEY.

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