ALEXANDRIA, Va., April 21 -- United States Patent no. 12,605,959, issued on April 21, was assigned to Pregis LLC (Chicago).
"Stations for forming heat seals in envelopes" was invented by Thomas D. Wetsch (Naples, Fla.).
According to the abstract* released by the U.S. Patent & Trademark Office: "Stations for sealing envelopes include a spacer, a positioning surface, and an envelope support surface configured to support the envelopes. A sealing mechanism is provided with sealing members configured to apply heat and pressure to a sealable member on the envelope to form a closure seal. The spacer and the positioning surface are configured to align the sealable member with the sealing members when the envelope is resting on the envelope suppor...