US2036451A - Ink motion - Google Patents

Description

H. A. W. WOOD 2 w1 INK MOTION Filed OGL. 24, 1934 lTED STATES PATENT INK MOTION Henry A. Wise Wood, New York, N. Y., assignor to Wood Newspaper Machinery Corporation, New York, N. Y., a corporation of Virginia Application October 24, 1934, Serial No. 749,786

(Cl. 10b-350) Claims.

The principal object of this invention is to provide a practical means whereby the ghosting which manifests itself in uneven shades in the printing can be entirely avoided. This is and serving as a reservoir for the ink. The fountain roll ll is provided as usual and the regulating blade l'l is shown. The fountain roll delivers ink to a pick-up roller i6 which, through 5 done by providing an improved means for transtransfer roller 9, supplies the ink drum e with 5 fering the ink to the form rolls from the ink the necessary amount of ink. drum. After the belt 5 contacts with the plates on the Other objects and advantages of the invention cylinder 2 it then contacts with the ink drum 5, will appear hereinafter. which not only imparts a new supply of the ink 10 Reference is to be had to the accompanying but also tends to eradicate any pattern on the 1U drawing, in which ink film.

Fig. 1 is an end view of a printing press unit After contacting with the ink drum` 6 the belt carrying two ink motions constituting one empasses around the roller ll and then under the bodiment of this invention, and distributors 8 and 1 respectively which will Fig. 2 is a similar view showing a modification. smooth out any pattern left on the outer surl5 One of the difficulties experienced in rotary web printing is the well known fact that when ink is transferred from the ink drum through a form roller to the printing plate the plate takes face of the endless belt 5. In this way the reduced thickness of ink in a pattern on the belt is eliminated before it gets back to the plate cylinder.

up a pattern of ink from the form roller, This It will be obvious that although I have shown 20 pattern of reduced thickness of ink on the form two distributors l and 8, any desired number roller is seldom eradicated as the form roller Can be Used t0 properly distribute the ink. passes back in contact with the ink drum and In the OTnl SlTLOWn in Fig. 2 a Similar a1- tncn with the plate. This is the cause of ghostrangement 0i printing couples is Shown but ing which produces uneven shades, particularly here, instead 0f having a belt fOI each form 25 in the dark areas of the printing. Attempts have I'Ollell e Single endleSS belt l@ iS empleyed Servbeen made to eradicate ghosting, especially by ing in place 0f tWO` OTIn IOlleiS. This belt longitudinal vibration of the ink drum. This DeSSeS aTOllnd tWU Cylinders I3 and under and other efforts, however, have proved partially cylinders i9 and 2l and several distributors 2E? inadequate and the present invention is designed are employed, aS Inany aS may be deSied. 30

`to fully eliminate the ghesting and t0 provide These distributors bear against the inked suryadditional distribution against the surface of face of the belt I6 and serve to eradicate any the element which, according to this invention, pattern left during previous Contact with the is provided in place of the form roller. platee- Referring to Fig. 1, the usual impression cyl- In both cases the transfer of ink from the 35 inders l cooperate with the usual plate cylinders ink drum 6 dieetly t0 a fOHn IOll in Contact '2 t0 OTm the printing COllples. Ordinarily the With it and then directly to the plate is avoided plate cylinders are supplied with ink by form by the interposition of the flexible belt 5 or it. rolls which contact with the ink drum but, ac- This belt is of a much greater length than the 40 cording to this invention, the form rolls are discircumference of the cylinder 3 or le. These 40 placed by a different means for transferring ink belts may be made of any strong flexible main the form of an endless belt 5 which contacts terial suitable for inking purposes. with the printing spaces carried on the plate cyl- Having thus described my invention and the inder 2 and with the ink drum 6. In this form advantages thereof, I do not wish to be limited of the invention, one of these belts 5 is substito the details herein disclosed, otherwise than 45 tuted for each one of the form rollers and it is as set forth in the claims, but what I claim carried by two cylinders 3 and 4, the former of iszwhich supports it firmly against the printing l. In an inking mechanism, the combination plates on the cylinder 2. Preferably the cylinder of an ink drum and means for transferring d is spaced from the ink drum 6 and the belt 5' the ink therefrom to the printing plates and 50 has a free space between the two. Also on the back to the ink drum at a different point on back there are distributor rolls 'l and 8 of well the ink drum from that from which it was known construction and function. taken, with means for redistributing the ink on Of course, the ink' is distributed from a founsaid means. tain lll located in a cavity in the base plate l5 2. In a mechanism for inking the plates on 55 a plate cylinder, the combination with an ink drum and means for supplying ink thereto, of a cylinder spaced from the ink drum, an endless belt passing over the last named cylinder into contact with the plates on the plate cylinder, a cylinder inside the endless belt for holding it against the ink drum, and distributing rollers engaging the belt on the side opposite the ink drum and between the two cylinders inside the belt, for the purpose described.

3. In an ink distributing system, the combination with an ink drum, and means for supplying ink thereto, of two endless belts engaging the opposite sides of the ink drum, means for supporting said belts and pressing them against the surface to be inked and means for distributing the ink on the surface ef each belt.

4. In an ink distributing mechanism, the combination with a cylinder and a pair of cylinders located on opposite sides thereof and out of contact therewith, of an endless belt passing over each cylinder and around the first cylinder, said cylinders serving to press the belt against a surface to be inked and a cylinder adjacent to the first cylinder for guiding the belt.

5. In an ink distributing mechanism, the combination with a central cylinder and a pair of cylinders located on opposite sides thereof and out of contact therewith, of an endless belt passing over said cylinders and around the central cylinder, said side cylinders serving to press the belt against a surface to be inked, a cylinder adjacent to the central cylinder for guiding the belt, means for distributing ink to said belt against the last named cylinder, and means on the inking side of said belt and located 0n cpposite sides of the belt structure for distributing the ink on the belt between the two first named cylinders and the last named cylinder.

HENRY A. WISE WOOD.

Images