Watertight note card assembly

Details Watertight note card assembly Watertight note card assembly

1990-08-29

1992-02-11

Eley, Timothy V.

Books, strips, and leaves for manifolding

Strip and leaf

283115, 273176L, 206579, B41L 120

Patent

active

050870793

ABSTRACT:
Disclosed is a note card assembly that is watertight, yet accessible to remove a completed note card. In one embodiment the assembly has a generally rectangular shape in plan view and comprises a watertight envelope having an interior pocket defined by permanent seals on three sides and a resealable seal on the fourth side. A subassembly inside the pocket includes a layered sandwich of a rigid writing board, a note card having a CF coated top surface, and a transparent sheet having a CB coated bottom surface in contact with the top surface of the note card. When pressure is applied to the outer envelope, a chemical reaction takes place between the two coated layers leaving a permanent marking on the top surface of the note card.

REFERENCES:
patent: 797548 (1905-08-01), Bates
patent: 1353889 (1920-09-01), Brown
patent: 1447358 (1923-03-01), Seguine
patent: 2333597 (1943-11-01), Strauss
patent: 2670971 (1954-03-01), Johnson
patent: 4331425 (1984-05-01), Davis
patent: 4448445 (1984-05-01), Chang
patent: 4729506 (1988-03-01), Neubauer
patent: 4746045 (1985-05-01), Schweim

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