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Browse Prior Art Database

PADDLE WHEEL INVERTER

IP.com Disclosure Number: IPCOM000023973D
Original Publication Date: 1979-Jun-30
Included in the Prior Art Database: 2004-Apr-01
Document File: 2 page(s) / 253K

Publishing Venue

Xerox Disclosure Journal

Abstract

A sheet inverting device which has top and bottom walls that converge at a point to form a V-shapedstructure remote from a paddle wheel that is located within but at the mouth of the structure. The paddle wheel is rotatable in either direction with the paddles themselves creating an interference contact surface with the walls.

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XEROX DISCLOSURE JOURNAL

PADDLE WHEEL INVERTER Proposed Classification

David N~Hawkins U.S. CL 271/186 George 3. Roller mt. CL B65h 29/00

A sheet inverting device which has top and bottom walls that converge at a point to form a V~shapedstructure remote from a paddle wheel that is located within but at

the mouth of the structure. The paddle wheel is rotatable in either direction with the paddles themselves creating an interference contact surface with the walls.

The amount of contact surface and contact pressure may be varied according to the specific dynamics of the sheet inversion required. Thus, paper is driven into the V~ shaped member through this contact surface made by the top or bottom wall and

the paddles. The sheet then strikes the inverter end creating a buckle.

However, since the paddle wheel is continuously rotating, the paddles contact the

lead edge of the paper. This drives the lead edge to the output nip created by the paddles and contact surface along the top or bottom wall, driving the sheet out. In actual practice, the length of the paddles, the number of paddle wheels per inverter, length of the paddles, the degree of interference between the paddles and top and bottom walls, and the length of the walls may be varied for optimum sheet inversion. Such a device has the potential for inverting sheets of various sizes without varying the inverter geometry when changing sheet size from one to

another.

The paddle wheel coefficient of friction with p...