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Pneumatic Printing Device

IP.com Disclosure Number: IPCOM000096009D
Original Publication Date: 1964-Nov-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 2 page(s) / 48K

Publishing Venue

IBM

Related People

Rutter, DE: AUTHOR

Abstract

Pneumatically controlled printing is accomplished with a low mass, high velocity element by providing a movable type element with a concentric control valve for it.

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Pneumatic Printing Device

Pneumatically controlled printing is accomplished with a low mass, high velocity element by providing a movable type element with a concentric control valve for it.

Type element 1 is secured to shaft 2 which also has piston 3 fixed on it. Spool valve 4 is concentrically and slidably mounted on shaft 2 and can reciprocate within chamber 5. Slug 6 is movable in chamber 5 and on the shaft 2 by air pressure. In standby condition, air at 1. 5 psi., supplied to channel 7, enters chamber 5 at port 8 and follows channel 9 to force piston 3 and spool valve 4 in opposite directions. Chamber 5 is vented to atmosphere by channel 10.

Actuation occurs by a pulse of air at 3 psi. entering channel 11 to force valve 4 toward piston 3. This movement opens chamber 5 to manifold 12 with air at 8 psi. which is passed by channel 13 to cavity 14. The high pressure drives slug 6 at velocity V1 to strike shaft 2. Shaft 2 and type element 1 are driven toward platen 15 at a higher velocity V2. The motion of piston 3 is transmitted directly or by air pocket to return valve 4 and cut off air at manifold 12.

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