Other

W. R. Grace Co.-conn.

Stephen L Fowler

Marvin Russell Havens

William Peyton Roberts

Ray G Brooks

Cynthia Louise Ebner

Timothy Wayne Brooks

Allison T Brown

George J McCrary, Jr

Alfred P Engelmann

A package for storing contaminant-sensitive articles in a contaminant-free environment featuring a pair of polymeric material circular half-sections having a bottom wall and a side wall. The half sections are arranged for overlying ans sliding engagement from a spaced-apart, open position into a stop position with the side walls in a telescoping relationship to form a closed enclosure having an interior for accommodating one or more contaminant-sensitive articles, Other features include: sealing means operatively associated with at least one of the side walls for sealing the enclosure interior in the stop position, resilient clamping means or latch mechanism on the half-sections for yieldingly urging the half-sections into the stop position against the sealing means to seal the enclosure interior, means for drawing a vacuum on the enclosure, and means on the enclosure for introducing a purging ionizing gas into the sealed enclosure interior to move the half-sections out of the stop position against the clamping means to thereby relieve excessive gas pressure in the enclosure interior.

Apparatus for packaging contaminant-sensitive articles and resulting

A semi-rigid, heat-sealable laminate with permanent antistatic characteristics comprising a semi-rigid packaging material having a coating of heat-sealable antistatic plastic. The antistatic plastic is a film of a modified acid copolymer. The modified acid copolymer is selected from (I) a mixture of (A) a polymer containing carboxylic acid moieties and (B) an antistatically effective amount of a quaternary amine, or (II) the acid/base reaction product of (A) a polymer containing carboxylic acid moieties and (C) an antistatically effective amount of an organic or inorganic base.

Semi-rigid heat-sealable laminates with permanent antistatic

Disclosed is a skin packaging film for skin packaging high profile and/or heavy articles. The film comprises linear ethylene/alpha-olefin copolymer. In one embodiment, the film is antistatic and may be employed for skin packaging of electro-static sensitive items such as circuit boards.

Process for skin packaging electostatically sensitive items

This apparatus having means responsive to a dual multifrequency telephone output to provide an electrical signal to an automatic gain control so as to provide preconditioning to a signal for amplification so as to provide an amplified signal to a comparator with visual light source responsive thereto to indicate activity at the other end of the phone line and a tone decoder also receiving the amplified signal to a digital binary code corresponding to the dual tone multifrequency signal received.

Growing community of inventors

Moore, SC, United States of America

Stephen L Fowler