Browse Prior Art Database

Wafer Buffer

IP.com Disclosure Number: IPCOM000085480D
Original Publication Date: 1976-Apr-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 2 page(s) / 56K

Publishing Venue

IBM

Related People

Hanscom, RW: AUTHOR [+3]

Abstract

Shown is a "dumbwaiter" or elevator type wafer storage buffer consisting of perforated flexible metal belts that move over parallel sprocket pulleys. The belts are synchronized by the belt perforations, sprocket pulleys and gears attached to a reversible drive motor. Bars (attached to the belts) support the wafers.

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Wafer Buffer

Shown is a "dumbwaiter" or elevator type wafer storage buffer consisting of perforated flexible metal belts that move over parallel sprocket pulleys. The belts are synchronized by the belt perforations, sprocket pulleys and gears attached to a reversible drive motor. Bars (attached to the belts) support the wafers.

Belts 1 and 2 drive together as do belts 3 and 4. Bars 5 support the wafers. Wafers are loaded (by means not shown) to the upper bars of belts 1 and 2. As the belts lower one space, another wafer enters. When the bars 5 reach the bottom, the wafer "floats" out of the buffer to the air track 6. Wafers leave output air track 7 in a similar fashion, adding a wafer to the bars 5 immediately below the previous wafer. The top wafer is removed with a taxi fork.

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