Browse Prior Art Database

Pneumatic Paper Transport

IP.com Disclosure Number: IPCOM000094938D
Original Publication Date: 1965-Jul-01
Included in the Prior Art Database: 2005-Mar-06
Document File: 2 page(s) / 35K

Publishing Venue

IBM

Related People

Barcia, CL: AUTHOR [+2]

Abstract

The device effects path selection in a pneumatic document handling system. The device has utility in, for example, a high speed system for storing and reading magnetic tape strips. In such system, it is desirable to select, read, and return the individual tape strips to storage in the least amount of time and with the least amount of physical handling, such as mechanical manipulation, which would tend to wear or abrade the tape surface.

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Pneumatic Paper Transport

The device effects path selection in a pneumatic document handling system. The device has utility in, for example, a high speed system for storing and reading magnetic tape strips. In such system, it is desirable to select, read, and return the individual tape strips to storage in the least amount of time and with the least amount of physical handling, such as mechanical manipulation, which would tend to wear or abrade the tape surface.

This device utilizes the principle of the jet amplifier to divert a main air column flowing along main channel 10 into either side channel 12 or 14. Control jets 16 and 18 are adjacent the leading edge of the opening into channels 12 and 14. In the drawing, a document is entering channel 12 due to the application of a control jet to jet amplifier input slot 16. The control jet is of an order of magnitude lower in pressure than the main jet and is thus easy to control.

Particular details of the jet amplifier can be varied to cause the main stream to latch permanently into a selected side channel once a control jet initially causes the switching or can be a variety in which the main air stream continues to flow in the side channel only so long as the control jet is applied. The illustrated document is a magnetic tape strip. However, other document media such as film strip or a wide variety of paper articles can equally well be transported and controlled in a similar fashion.

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