US1511783A - Inking roller - Google Patents

Description

LBMJS M M H9M J. C. SPROULL INKING ROLLER v Filed Aug. 25, 1921 Patented @et 1d, 19241. Y

JOHN C. SPROULL, OF AKRON, OHIO, ASSIG-NOR TO' THE B. F. GOODRICH COMYANY, 0F NEW YORK, N. Y., A CORPORATION OF NEW' YORK.

INKING ROLLER.

Application filed August 23, 1921.

To all whom t lmay concern:

Be it known that I, Jox-IN C. SrRoULL, a citizen of the lUnited States, residing at Akron, in the county of Summit and State of Ohio, have invented a certain new and useful Inling Roller, of which the following` is a specification.

This invention relates to rollers for inking the printing' surfaces of printing presses, and its object is to pro-vide improved means for overcoming the spring or camber of the roller'and thus secure a more even distribution of ink throughout its length. As ordinarily construct-ed, such a roller is r made tubular for the sake of lightness and is provided with a pair of short stub-shafts fixed in its ends and forming the journals for the roller, which is thus supported only at its ends', with the result that the roller' springs slightly from the pressure of the printing cylinder and thus fails to secure an adequate pressure along its middle portion. My invention overcomes this difficulty and consists in the features hereinafter described and claimed.

Of the accompanying drawings:

Fig. 1 is a side elevation, partly in section, showing a preferred form of my improved inking,- roller structure.

Fig'. 2 is an end elevation of the mounting, showing part of a printing cylinder.

Referring to the drawings, 10 is a shaft which is keyed at its ends to a pair of slideblocks 11, which are slidabl'e in vertical ,quideways 12, in a pair of supportingbrackets 18, formed on the press-frame 14, so that the inhing roller may rest on fthe surface of the printing cylinder 15, against which it is held with considerable pressure by a pair of set-screws 16, engaging,- the blocks 11.

17 is an inking-roller mounted on the shaft 10A and comprising a tubular core or shell 18, which may b'e made of metal or any other suitable material, such as hardrubber mixed with fiber, and a soft cylindrical surface 19 which may be made of any of the usual materials, but preferably of Serial No. 494,510.

a suitable rubber compound vulcanized upon the core 18. The roller 17 is supported on a shaft 10, in this instance at two points only, by means of a pair of ball-bearings 20, whose inner and outer race-ways may be secured in any suitable manner upon IJthe shaft 10 and core 18 respectively, as by means of a forced fit on a suitable cylindrical surface of the shaft and core, their correct spacing beingmaintained by stop- shoulders 21 and 22.

rlhe bearings 20 are located well wit-hin the tubular core 18 at points remote from its ends, preferably at a distance of onequarter of the length of the roller from said ends, so as to leave an unsupported qua-rter length at each end and an unsupported half length in the middle. Each half of the roller then acts in effect as a lever fulcrumed at its middle point, the pressure on one end of which counterbalances the pressure on the other end, so

that the amount of spring or camber` which can be imparted to the unsupported portions of the roller is greatly reduced. Any spring which may occur in the shaft 10 is ineffectual to disturb the rotative balance and the roller may, therefore, run approximately true at a very high speed, since the shaft is ron-rotating and consequently may act simply as a spring support for the bearings 20.V

I claim:

In a printing-press, the combination of a printing-cylinder, a pair of shaft supports adjacent thereto, a shaft slidinpgly mounted in said supports in a. position parallel to said cylinder and held against rotation, a tubular inking roller surrounding said shaft, and a pair of anti-friction bearings interposed between said shaft and roller and located within the roller at a distance approximately one-quarter of the length of the roller from each end.

ln witness whereof l have hereunto set my hand this 19th day of August, 1921.

JOHN C. SPROULL.

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