Method and apparatus for stacking pressure-sensitive adhesive envelopes
OwnerJunji J. Shimazakiinventor
Life of this patent
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Abstract
The present invention relates to a stack of pressure sensitive adhering envelopes wherein each envelope can be easily removed from the stack and used without having to moisten the flap. The flaps of the envelopes are treated on the back side with a release coating and on the front side with a pressure sensitive adhesive so that when the envelopes are stacked with the flaps open, the adhering interface between the pressure sensitive adhesive and the release coating is not permanent. Each envelope in the stack can be easily removed from the stack and sealed by folding the flap onto the body portion of the envelope and applying a slight pressure onto the flap. No release tape is required because each adjacent envelope is treated with the release coating.
Claims20
A stack of envelopes comprising:
- at least two envelopes removably adhered together to form a stack, wherein each envelope in the stack comprises:
- an envelope back wall having a sealing flap extending therefrom, said sealing flap having a front side and a back side;
- an envelope front wall in overlapping relation to said back wall, wherein a pocket is formed between said envelope front wall and said envelope back wall;
- and
- wherein at least a portion of said sealing flap front side has thereon a pressure sensitive adhesive material, and at least a portion of said sealing flap back side has thereon a release coating;
- wherein each of said envelopes are stacked together with the sealing flaps facing substantially the same direction, wherein between adjacent envelopes in the stack, the sealing flap front side of one envelope is positioned adjacent the sealing flap back side of an adjacent envelope, and, wherein the pressure sensitive adhesive of one envelope is positioned directly adjacent the release coating of an adjacent envelope in the stack, wherein the envelopes in the stack are adhered together by said adhesive, whereas, the release coating permits the envelopes to be easily separated from the stack and each other when needed.
A stack of envelopes, comprising:
- at least two envelopes removably adhered together to form a stack of envelopes, wherein each envelope comprises:
- a body portion having a body front side and a body back side, wherein a pocket is formed between said body front side and said body back side;
- a sealing flap extending from said body back side, said sealing flap having a front side and a back side;
- wherein at least a portion of said sealing flap front side has thereon a substantially permanent pressure sensitive adhesive material, and wherein at least a portion of said sealing flap back side has thereon a release coating;
- wherein between adjacently adhered envelopes in the stack, the adhesive material of one envelope is positioned directly adjacent the release coating of an adjacent envelope, such that the envelopes are adhered together in the stack by said adhesive, wherein said release coating permits said envelopes to be adhered together, but prevents said adhesive from bonding the envelopes in the stack permanently together.
A stack of envelopes, comprising:
- at least two envelopes, each having a body formed from a single sheet of paper, said body comprising:
- an envelope back wall having an upper flap extending therefrom, said upper flap having a front side and a back side;
- an envelope front wall formed from three overlapping lower flaps extending from said envelope back wall, wherein said three overlapping lower flaps are folded and glued together to form a pocket;
- and
- wherein at least a portion of said upper flap front side has thereon a pressure sensitive adhesive material, and at least a portion of said upper flap back side has thereon a release coating;
- wherein said envelopes are removably adhered together to form a stack of envelopes, such that the upper flap front sides are adjacent the corresponding upper flap back sides, wherein the adhesive material of one envelope is positioned directly adjacent the release coating of an adjacent envelope, wherein said adhesive and said release coating permits said envelopes to be adhered together, and to be separated from the stack and each other when needed.
Dependencies are inferred from the claim text.