Self-sealing envelope and method of making same

Envelopes – wrappers – and paperboard boxes – Envelope – Closures

Patent

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

34 1, 156273, 219 1081, B65D 2714

Patent

active

040552950

ABSTRACT:
A self-sealing envelope is made by folding a paper blank having a flap, a front panel, a back panel and end flaps. Back seams of the body are sealed with an adhesive having a predetermined dielectric constant. Strips of latex material having the same or a lesser dielectric constant are applied to the flap and body in positions which register when the flap is closed. The envelope is dried in a dielectric heating chamber. Suitable latex materials have a low pH factor or a low metal salt content.

REFERENCES:
patent: 2087410 (1937-07-01), Lane et al.
patent: 2147689 (1939-02-01), Chaffee
patent: 2606856 (1952-08-01), Hurrey et al.
patent: 2676416 (1954-04-01), Calosi et al.
patent: 2723517 (1955-11-01), Mittelmann
patent: 3293765 (1966-12-01), Winkler et al.
patent: 3357108 (1967-12-01), Bennett
patent: 3396474 (1968-08-01), Walther et al.
patent: 3404462 (1968-10-01), Hanson et al.
patent: 3456355 (1969-07-01), Cumming et al.

LandOfFree

Say what you really think

Search LandOfFree.com for the USA inventors and patents. Rate them and share your experience with other people.

Rating

Self-sealing envelope and method of making same does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Self-sealing envelope and method of making same, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Self-sealing envelope and method of making same will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFUS-PAI-O-119749

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.