Envelope opening process and composition
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United States of America Patent
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Oct 21, 1980
Grant Date -
N/A
app pub date -
Aug 13, 1979
filing date -
Aug 13, 1979
priority date (Note) -
Expired
status (Latency Note)
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Abstract
In an envelope opening process in which an aqueous solution of a chemical degradation agent, such as tartaric acid is applied to envelope edges and the envelope edges are then heated and subjected to a mild mechanical action, penetration of the degradation agent through the envelope paper at its edges is assured by including in the aqueous solution from 2.5% to 30% of a glycol ether, such as ethylene glycol ethyl ether.
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