Browse Prior Art Database

Air Flow Smoothing Device for Aspirated Ink Jet Printers

IP.com Disclosure Number: IPCOM000052935D
Original Publication Date: 1981-Aug-01
Included in the Prior Art Database: 2005-Feb-12
Document File: 2 page(s) / 32K

Publishing Venue

IBM

Related People

Wittwer, AL: AUTHOR

Abstract

U.S. Patent 4,097,872 describes an axial drop aspirator for a continuous ink jet. Within the settling chamber of the aspirator are a pair of flow smoothing screens which serve to distribute the pressure evenly downstream of the air entrance side and to make more uniform the air flow therethrough. Described below, and shown in the figure, is an air-flow smoothing device or screen to help produce homogeneous laminar air flow.

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Air Flow Smoothing Device for Aspirated Ink Jet Printers

U.S. Patent 4,097,872 describes an axial drop aspirator for a continuous ink jet. Within the settling chamber of the aspirator are a pair of flow smoothing screens which serve to distribute the pressure evenly downstream of the air entrance side and to make more uniform the air flow therethrough. Described below, and shown in the figure, is an air-flow smoothing device or screen to help produce homogeneous laminar air flow.

Referring now to the figure, an air-flow smoothing device 10 is illustrated therein. The device is preferably formed of a rubber outer ring 11 and a rubber interior ring or core 12, the ring 12 adapted to circumscribe the tunnel of the aspirator device (not shown). The body portion 13 of the air-flow smoothing device 10 is preferably composed of a corrugated strip which is wound upon the core or rubber ring 12, the strip being continuous from the interior ring 12 to the exterior ring 11. The corrugated strip 14 of the body portion comprises a single flat element 15 (.001 x .100 inch) to which is bonded or otherwise attached a similar strip 16 which is corrugated so as to define air flow passages approximately .010 inch in height.

With an air-flow smoothing device such as above described, air velocity or pressure perturbation in the air prior to entry into the aspirator deflection tunnel is reduced. Such a structure has been found to break up the overall large flow patterns into many smal...