Browse Prior Art Database

Multiple Incline Plane Paper Separator

IP.com Disclosure Number: IPCOM000080604D
Original Publication Date: 1974-Jan-01
Included in the Prior Art Database: 2005-Feb-27
Document File: 2 page(s) / 30K

Publishing Venue

IBM

Related People

Williams, KB: AUTHOR

Abstract

Friction feeding of the top sheet of a stack of paper requires that the coefficient of friction of the driver, is always greater than the coefficient of friction between sheets of paper. Placing an inclined wall or plane surface at the feeding end of a stack of paper, is a fairly well-known method of achieving reasonably reliable single-sheet picking. However, a fairly delicate balance exists between the angle of the plane, the distance the driving force is applied from the plane, the coefficient of friction between the plane and the paper, the bending stiffness of the paper, and the coefficient of friction between the various sheets of paper. Of the parameters, the latter is the most variable and least predictable.

This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately 83% of the total text.

Page 1 of 2

Multiple Incline Plane Paper Separator

Friction feeding of the top sheet of a stack of paper requires that the coefficient of friction of the driver, is always greater than the coefficient of friction between sheets of paper. Placing an inclined wall or plane surface at the feeding end of a stack of paper, is a fairly well-known method of achieving reasonably reliable single-sheet picking. However, a fairly delicate balance exists between the angle of the plane, the distance the driving force is applied from the plane, the coefficient of friction between the plane and the paper, the bending stiffness of the paper, and the coefficient of friction between the various sheets of paper. Of the parameters, the latter is the most variable and least predictable.

Illustrated is a feed system for assuring reliable single-sheet feeding, by incorporating a succession of incline planes with a controlled coefficient of friction between each plane and the paper. With this arrangement quite reliable sheet separation can be simply accomplished. The coefficient of friction between the incline plane and the paper must be less than that between the friction driver and the paper, and greater than or equal to that of paper-to-paper.

By locating a friction driver a controlled distance from each of the incline planes, each incline plane becomes a separate successive sheet separator. Thus, if each incline plane is a 90% reliable separator, three successive incline planes result in a 99.9...