Device for conveying and aligning sheets in sheet-processing machine

Abstract

Abstract PURPOSE: To convey and align a sheet in a sheet-processing printing machine with at least one frictionally driven ball supported so that it is rotary in all directions, and at least two frictional-force transmission sections located at the periphery of the ball and disposed at 90° from one another. CONSTITUTION: The device 7 has two boxy low-pressure chambers 8, 9 on the same height. In the chambers 8, 9, a ball 18 is supported by four ball bearings 19-22 on a spherical surface so that it is rotatable in all directions at the fixed center M. It is frictionally driven by two frictional-force transmissions 30, 31 located at the periphery of the ball and disposed at 90°C from one another. The transmissions 30, 31 have friction wheels 32, 33 driven by a motor. The edge of a sheet A is detected by a scanner 38 to start the transmissions 30, 31. The sheet A is forced in a slant direction to be aligned correctly by the ball 18 is driven to the direction 34° slanted from the sheet feeding direction x when the wheels 32, 33 rotates at the same speed. COPYRIGHT: (C)1989,JPO

Inventors

• 👤 Bertold Gruetzmacher
• 👤 Peter Theodor Blaser

Bibliographic Details