US1201788A - Rotogravure printing-press. - Google Patents

Description

J. C. YETTER. ROTOGRAVURE PRINHNG PRESS. APPLICATION men nwzo, x915.

Patented Oct. 1?, 1916. 2 snzns-smzsr 1.

4; c. YETTER. ROT O GRAVURE PRINUNG PRESS. APPLICATION FILED DECJO. "H5.

' Patented 0015111916 2 SHEETS-SHEET 2'.

JOHN C. YETTER. OF CHICAGO, ILLINOIS.

RQTOGRAVURE PRINTING-PRESS.

following to be a full, clear, and exact description of the invention, such as will cn able others skilled in the art to which it.

appertains to make and use the same.

This invention relates to improvements in so-called rotogravure printing presses, and has for its particular object to provide means for rapidly and effectively drying the printed sheets immediately after printing the same, and before they are delivered to the sheet delivery mechanism of the press. In presses of this character the ink is applied relatively thickly from a copper printing roll and, though a very quick-drying ink is employed, it very frequently happens that the sheets are smudged by surface contact with each other whendelivered on the stack by the sheet delivery mechanism.

To avoid such smudging is the particular object of the present invention.

In the accompanying drawings illustrating a suitable embodiment of my invention: Figure 1- is a. fragmentary view in side elevation of a rotrogravure printing press embodying my invention. Fig. -2- is a fragmentary detail vertical longitudinal section of the same on an enlarged scale. Fig. 3 is a. vertical transverse section of the same on the line 33 of Fig. 1-. Fig. 4- is afragmcntary detail View in elevation showing the jacket for what I term the drying roll of the machine.

The press comprises a supporting frame 1 equipped with a feed table 2 and an impression roller 3 rotatably supported in bearings 4 on the frame 1. The said roller 3 is provided with the usual sheet-engaging mechanism 5, which is not particularly illustrated herein as it constitutes no part of the present invention. Associated with the roller 3 is the printing roll 6 to which ink is applied by a roller 7 in the usual and well-known manner. Said rolls 3 and 6 rotate in opposite directions thereby printing the exposed or convex face of the sheet carried by the roll 3, the said sheet being delivered from the roll 3 to the roll sin a well-known manner. The roll 8 is equipped T with sheet-engaging mechanism 9 which is Specification of Letters Patent.

Patented Oct. 17, 1916.

Application fil ed December 20, 1915. Serial No. 67,886.

of the usual and ordinary construction, and is, therefore, not specifically illustrated herein. The said roll 8 is hollow and its circumferential wall is perforated. It communicates atone end, through the hollow trunnion 10 thereof, with a source of supply of hot compressed air by means of the pipe 11 connected with the bearing for said hollow trunnion 10. Disposed concentric with the said roll 8 and rigidly mounted on the frame 1 in any suitable manner, is a jacket 12 of sheet metal, the interior surface of which is preferably very smooth. Said jacket is provided with slots 13 and 1 1 livered, respectively. The roll 15, equipped with sheet-engaging mechanism 16, of usual and ordinary construction, receives the sheets from the roll 8, and delivers the same upon the sheet delivery belts 17 in a wel1- known manner. The said roll 8 is provided contiguous to its ends with a pair of slidable collars 18, which are adjustable toward and from the middle of said roll 8, and are suitably held in place in any well-known manner. The side edges of the sheets delivered from the roll 3 are adapted to rest on the annular faces said collars. The sheet engaging mechanism 9 is disposed to engage the end of the sheet in the cylindrical plane of the exterior or convex faces of said collars 18. Thus the perforatedf c'ter. than the sheet-supporting surface, the sheet being maintained bellied outwardly by the force of the air currents delivered from the perforations of said cylinder and impinging against the printed face of the sheet which opposes said perforations. The said jacket 12 is provided with a concaveconvex projection 19 which is connected at one end with an exhaust pipe 20 which in turn communicates with an exhaust fan or similar well-known device not herein illustrated, whereby the air delivered into'the jacket from the pipe 11 and perforations of' the cylinder employed contains a large percentage of benzin or similar volatile liquid, it is advantageous to draw off the air-admitted and carrying the vapors in order to maintain the air in the press-room free of the same. The said drier may obviously be incorporated in a press for consecutively printing both sides of sheets in one passage through the press, the number of driers emis drawn off. As the ink ployed corresponding with the number of sets of printing elements of the press.

It will be understood, of course, that I have limited the illustration to the details of construction only of those elements which enter into the combination forming subject of the invention, the latter consisting in the features of construction and combinations of parts defined in the appended claims and including any equivalent or substitution of any or all of said elements falling within the scope of such claims.

I claim as my invention:

1. In a printing press, the combination with the printing and impression rolls, and sheet delivery mechanism, of a hollow perforated roll interposed between the same equipped with sheet -engaging n'ieans, the sheet adapted to have its printed face opposed to the surface of said roll, connection between the interior of said roll and a source *ef supply of air under pressure for effecting -forced passage of air over the printed face of the sheet during engagement thereof with said roll, a jacket concentric with said roll and rigid with the frame of the machine and between which and said roll the sheet is adapted to pass, there being slots in said jacket through which the sheet is received and delivered.

2. In a printing press, the combination with the printing and impression rolls, and sheet delivery mechanism, of a hollow 'ierforatcd roll interposed between the same equipped with sheet--cngaging means, the sheet adapted to have its printed face opposed to the surface of said roll, connection between the interior of said roll and a source of supply of air under pressure for effecting fbrced passage of air over the printed face of the sheet during engagement thereof with said roll, a jacket concentric with said roll and rigidwitlr the frame of the machine and between which and said roll the sheetis adapted to pass, there being slots in said jacket through which the sheet is received and delivered, and connection between said jacketand a suction pipe;

In a printing press, the combination with the printing and impression rolls, and sheet delivery mechanism, of a hollow perforated roll interposed between the same equipped with sheet-engaging means, the sheet adapted to have its printed face opposed to the surface of said roll, connection between the interior of said roll and a source of supply of air under pressure for effecting forced passage of air over the printed face of the sheet during engagen'ient thereof with said roll. a jacket concentric with said roll and rigid with the frame of the machine and between which and said roll the sheet is adapted to pass, there being slots in said jacket through which the sheet is received and delivered, and means adapted for exhausting the air from said jacket at that portion that the sheet does not pass.

4. In a printing press, the combination with the printing and impression rolls, and sheet delivery mechanism, of a hollow. perforated roll interposed between the same equipped with sheet-engaging means, the sheet adapted to have its printed face opposed to the surface of said roll, connection between the interior of said roll and a source of supply of air under pressure for effecting forced passage of air over the printed face of the sheet during engagement thereof with said roll. a jacket concentric with said roll and rigid with the frame of the machine and between which and said roll the sheet is adapted to pass, there being slots in said jacket through which the sheet is received and delivered, whereby the sheet travels more than one hundred and eighty degrees around said perforated roll, and a suction pipe connected with the casing adjacent to the delivery slot and on the portion between the two slots where the sheet does not travel.

In testimony whereof I have signed my name in presence of two subscribing witnesses.

J OlIN C. YETTIQR. Witnesses:

M. M. BOYLE, G. M. WALKER, Jr.

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