Browse Prior Art Database

PADDLE WHEEL FEEDER

IP.com Disclosure Number: IPCOM000025042D
Original Publication Date: 1983-Jun-30
Included in the Prior Art Database: 2004-Apr-04
Document File: 2 page(s) / 123K

Publishing Venue

Xerox Disclosure Journal

Abstract

A paddle wheel feeder 200 is disclosed in Figures 1 and 2 that employs a single paddle wheel 205 that has blades or paddles 210 attached thereto. Prior paddle wheel inertial feeders relied only on the inertia of the sheets of paper, paddle to paper and paper to paper friction. This improvement has the ability to handle differential intersheet friction and comprises a paddle wheel 205 in conjunction with an additional guide member 220 that has a friction surface 221. The friction surfaced guide member 220 is positioned adjacent the lead edge of the stack and the paddle wheel 205 is critically positioned so that the axis of hub or shaft 206 is in front of the lead edge of the stack with the stack height on platform 31 being controlled relative to the frictional guide surface by conventional means, such as a tray elevator or a simple mechanically controlled escapement system. Also, the friction surface 221 is preferably of a material such as cork that has a coefficient of friction against paper that is less than the paddle wheel to paper friction coefficient but greater than paper to paper friction.

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Page 1 of 2

A 'EROX DISCLOSURE JOURNAL

PADDLE WHEEL FEEDER 271/119 CI. U.S. Proposed Vorton Silverberg Classification

Int. C1. B65h 3/06

205

206

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303v

302

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Volume 8 Number 3 \lay/June 1983 209

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Page 2 of 2

PADDLE WHEEL FEEDER (Cont'd)

A paddle wheel feeder 200 is disclosed in Figures 1 and 2 that employs a single paddle wheel 205 that has blades or paddles 210 attached thereto. Prior paddle wheel inertial feeders relied only on the inertia of the sheets of paper, paddle to paper and paper to paper friction. This improvement has the ability to handle differential intersheet friction and comprises a paddle wheel 205 in conjunction with an additional guide member 220 that has a friction surface 221. The friction surfaced guide member 220 is positioned adjacent the lead edge of the stack and the paddle wheel 205 is critically positioned so that the axis of hub or shaft 206 is in front of the lead edge of the stack with the stack height on platform 31 being controlled relative to the frictional guide surface by conventional means, such as a tray elevator or a simple mechanically controlled escapement system. Also, the friction surface 221 is preferably of a material such as cork that has a coefficient of friction against paper that is less than the paddle wheel to paper friction coefficient but greater than paper to paper friction.

In operation, paddles 210 urge one or more sheets from the top of stack 30. As the sheet or sheets move forward, their lead edges are pinches between the friction surfaced guide 220 and the paddle wheel blades 210. A single sheet continues to be urged forward by the differential friction advantage of the paddle to paper interface versus the paper to friction surface interface. If two or more sheets are fed between the paddles 210 and the friction surface, further motion of the bottom sheet is inhibited by the differential friction of the friction surface to paper interface versus the paper to paper interface.

A critical aspect of the invention shown in Figures 1 and 2 involves the location of the axis of hub 206 in front of the lead edge of the stack 30. This...