Browse Prior Art Database

Evaporator With Screening for Contamination Control

IP.com Disclosure Number: IPCOM000046621D
Original Publication Date: 1983-Aug-01
Included in the Prior Art Database: 2005-Feb-07
Document File: 2 page(s) / 41K

Publishing Venue

IBM

Related People

Carbone, QJ: AUTHOR [+4]

Abstract

Screening members are inserted into a conventional evaporator to retain extraneous evaporant materials in the apparatus. The screening prevents excess evaporant material from being released in sheets, flakes or particulate matter during processing which causes product contamination. In the drawing, a standard evaporator 10 includes dual evaporant sources 11 and 12. A screen member 14 covers the source area as well as the shutter area 16. An isolation valve shield is covered with a screen member 20. Screen members 25 and 26 were also incorporated into the apparatus. The member 25 totally covers the collar. A screen insert is placed in the product chamber. Screening is applied to only where the area of deposition of evaporant material occurs.

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Evaporator With Screening for Contamination Control

Screening members are inserted into a conventional evaporator to retain extraneous evaporant materials in the apparatus. The screening prevents excess evaporant material from being released in sheets, flakes or particulate matter during processing which causes product contamination. In the drawing, a standard evaporator 10 includes dual evaporant sources 11 and 12. A screen member 14 covers the source area as well as the shutter area 16. An isolation valve shield is covered with a screen member 20. Screen members 25 and 26 were also incorporated into the apparatus. The member 25 totally covers the collar. A screen insert is placed in the product chamber.

Screening is applied to only where the area of deposition of evaporant material occurs. The screen inserts and coverings have been found to be totally effective in retaining extraneous evaporant material in the apparatus. The time for changing the internal tooling parts of the apparatus has been increased by 50%. The limiting factor in these changes is the ability to clean the heavier evaporant material from the screening and not evaporant peeling or flaking. A screening material found to be acceptable is 304 stainless steel, .020 diameter wire, woven mesh (26); 23% open.

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