US1399987A - Rotary photogravure-printing machine - Google Patents

Description

W. PIC'KUP. 50mm PHOTOGRAVUBE PRINTING- MACHINE.

APPLICATION, FILED OCT. 25, 1919- Patented Dec. 13, 1 921.

20 I manner that the second and subsequent WILLIAM-PICKUP, or rENDLEToN, nnraunomber rnoroGn-AvnnE-rrtm'rme MACHINE.

Specification of Letters Patent. Patented Dec. 13, 1921.

Application filed October 25, 1919. Serial No. 333,148.

To all whom it may concern:

Be it known that. I, VILLIAM PICKUP, a subject of the King of Great Britain, resid ing at. Pendleton, in the county of Lancaster, England, have invented certain useful Improvements in Rotary Photogravure-Printing Machines, of which the following is. a specification. I

This invention relates to that type of rotary photogravure printing machines in which an etched or engraved copper cylinder is employed for printing pictures or reading matter on paper or other material in sheet or reel form, in one or more colors by passing same once, twice or more times through the machine.

I This invention has for its object to pro- "vide said type of machines with simple and effective means which permit of printing sheets of paper or other materlal in such a printing will be in accurate register.

I attainthe redited object by themechanism. illustrated i the accompanying sheet of drawing.

Referring to the drawing, the printing cylinder a is as usually mounted in two bearings b, rendered slightly vertically movable in guides c and above said cylinder is mounted also in suitable bearings, an impression roller 6 between which and the cylinder a the paper 7 is fed to take the etching or engraving from theprinting roller a.

Above the impression roller 6, a vertically adjustable pressure roller g is as usually employed to run in contact therewith.

The printing roller a revolves continuously and drops slightly every alternate revolution, which provides time for inserting the paper f in sheet form between cylinder a and roller e, and dispenses with the ordinary feed grippers hitherto necessary.

h is the board'or table by which the sheets of paper are fed. This board or table is pro vide'd with wheels 11 and rendered horizontally reciprocable on rails is.

The feed board or table 71. is'provided with the usual lay guides Z rendered adjustable thereon.

The printing cylinder at is raised and dropped by means of cams m secured on each end of the driving shaft 11- and acting upon links 0 vertically slidable in the frame p of the machine and with upper ends pivoted to the bearings b. The driving shaft or has selever mechanism is employed, worked from the cam shaft 02. by means of the cam u, adapted to move the board or table it carrying the sheet 7' toward the printing cylinder a the required distance, the front edge of the sheet being placed slightly past the vertical center line of the printing cylinder a.

The said lever mechanism comprises in the present instance, a lever o having two arms 20, m of which 20 is acted upon by the cam u while the other arm a: by means of a connecting rod is pivoted to the feed board table it and adapted to reciprocate same.

The cams m are timed at this point to lift the printing cylinder aagainst the impression cylinder 6. The sheet is printed on the under side and as it leaves the printing cylinder a and impression roller 6, passes between two steel guides z, 2 and is then received by a pair of endless traveling tapes 3 which turn the sheet over ready for delivery on the receiving board or lattice 4..

I claim 1. In a rotary photogravure' printing machine having avertically slidable printing cylinder and above same mounted a vertical 1 stationary impression roller, a spur wheel se- 7 cured on the shaft of said printing cylinder, a driving shaft mounted below in a vertical line with said cylinder, a spur wheel secured to said driving shaft, a spur wheel mounted vertical stationary in a horizontal line and in'gear with the spur wheel on the shaft of 10o said cylinder and an intermediate spur wheel mounted between and in gear with said vertical stationary wheel and the spur wheel -on said driving shaft, for the purpose specified.

chine. as claimed in claim 1,- a horizontally movable feed-table and means for intermit- 2. In a rotary photogravure printing ma-' tentlyactuating-- same from said-driving v shaft, for the purpose specified.

3. A rotary photogravure printing ma- Signed at Manchester, in the county of chine as claimed in claim 2, comprising a Lancaster, this 2nd day of October, 1919. cam secured to said driving shaft, an afigular lever fulcrumed with one end in direct PICKUP 5 contact with said cam with othef' end pivot- ,Witnesses: allyconnected with-the said paper feed table, ALFRED BOSSHARDT,

for the purpose specified. MARY I. Bossmnn'r.

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