US1683718A - Paper-feeding means for printing presses - Google Patents

Description

Sept. 11, 1928. Q 1,683,718

. W. GEGENHEIMER PAPER FEEDING MEANS FOR PRINTING PRESSES Filed Feb. 25, 1927 2 Sheets-Sheet INVENTOR Wmuim Gaosnnsmknk.

- ZAJJM ATTORNEY Sept. 11, 1928. 1,683,718

W. GEGENHEIMER I PAPER FEEDING MEANS FOR PRINTING PRESSES Filed Feb. 25, 1927 2 Sheets-Sheet 2 INVENTOR mum GEGENHE'MER BY J a V M ATTORNEY associated elements;

Patented Sept. 11, 1928.

OEBALD'WIN, NEW YORK.

rhea-manure MEANS roii PRINTING rnnssns.

' "Application filed February 25, 1927. Serial No. 170,821,

The object of the presontinvention is ,.to provide means for feeding paper in pr1nting or lithographi'ng presses whereby the paper may be stretched in such manner as to prevent formation of wrinkles. It frej quent'ly happens that rolls or sheets of paper absorb moisture along their margins or elsewhere when the paper is rolled or stacked and such sections of the paper sheet or roll expand and become of greater area than the dry and relatively contracted sections. It

is the specificob1ect ofthe present invention to provide means for so feeding sheets of paper as to prevent wrinkling.

Theinvention will be understood by reference to the accompanying drawings, in which' Figure 1 is a sectional plan View showing an embodiment of the invention applied to a rinting press of the cylinder type igure 2 is a view in elevation of the same; i

Figure 3 is an enlarged sectional detail view of one set of the paper stretching rolls;

Figure 4 is a detail perspective view of the supporting and operating lever for the lower stretching roll;

Figure 5 is a sectional front elevation of the improvements applied to a cylinder press; a

Figure 6 is a detail front elevation of the cam shaft together with its supporting and Figure 7 is a perspective View of the operatingcam and cam lever. V i

Referring to Figure 2 of the drawings, 1, 1? indicate printing cylinders of a press and 2 indicates a sheet of paper passing through the press by the rotation of the said cylinders. Projecting forwardly of the press I frame member 3 is an arm 4 having a boss 48 apertured to receive a stud shaft 5 which is held against endwise movement inwardly by a pin or other means 5 (Figure 5); Mounted on a shaft 5 is a lever 6 which at its end carries a shaft 7 upon which is mounted a roll 8. The front end of the shaft is forked at 6 to embrace a cam shaft 9 supported by arm 4. Lever arm 6 is formed with a boss (Ff in which is mounted a lateral proieeting stud shaft 10. And mounted "torock upon shaft 10 is a rock lever 11 carrying at one end a roll 12 and at its opposite end being held in contact with a cam 13Lby means of a spring 1a, one end of the spring being connected to lever 6 and the opposite end to the rock arm 11 in such'manner that the roll 12 is moved toward role 8 tension.

By reference to Figure 3 it will benoted that roll 12 is shown as mounted on a shaft under spring set at an angle relatively to the shaft for roll 8. In other words, shaft 12 is toed out toward the margin of the paper as the latter is fed through the press and thus side pull is created on the sheet, stretching the paper so that it passes into the press perfectly flat, it being understood that the stretching device described above at one side of the press is duplicated at the opposite side of the press, both side margins of the paper being acted upon. 7

In the operation of the device, the rolls 8 and 12 are rotated through friction imposed upon them by the sheet 2 in its passage between the printing rolls. periodically acts upon the rock lever 6 and lever 11'to separate the rolls and permit the passage of a new sheet betweenthem and into position to be engaged by the print .ing rolls. The side pull of one device on one Cam 13 margin of the paper is duplicated by the spring 14'. It will also be understood that one of the rollsmay be eliminated where a support or contact member for thesheet is placed on the opposite side of the roll which is retained. i

Inasmuch as the fundamental idea of the invention is to provide means for autoinati- 'cally stretching the sheet laterally durin its passage between the printing rolls, it will be understood that various modifications may be made inthe embodiment of the in vention illustrated in the drawings without I one of the rolls being held at an angle to roll being disposed at an angle relatively to the marginal line of the sheet; the marginal line of the sheet, and means 2. In combination with a printing press, for periodically moving the rollin' a direcincluding means for feeding a sheet theretion away from the sheet. 5 through, a roll for a side margin of the sheet In testimony whereof, I have signed my and adapted to engage the latter and to be nameto thisSpecification. rotated by frictional contact therewith, the 7 WILLIAM GEGENHEIMER. i

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