Stack of pressure sensitive adhesive coated sheets

Details Stack of pressure sensitive adhesive coated sheets Stack of pressure sensitive adhesive coated sheets

1989-03-01

1990-01-23

Thomas, Alexander S.

Stock material or miscellaneous articles

Layer or component removable to expose adhesive

Halogen containing compound

428194, 428202, B32B 706

Patent

active

048957461

ABSTRACT:
A stack of aligned sheets, each of which sheets includes a backing, a coating of pressure sensitive adhesive on a lower surface of the backing by which the sheet is adhered to the sheet beneath it in the stack, which coating extends along and within at least 12.5 mm of all of the edges of the backing, release means providing a first adhesion zone between adjacent sheets in the stack and adjacent one of the edges of the sheet for providing a sufficiently low release force between the adhesive coating and the upper surface of the adjacent sheet in the stack to afford, when the sheet is the uppermost sheet in the stack, each initiation of peeling of the sheet from the adjacent sheet in the stack, and attachment means providing a second adhesion zone between adjacent sheets in the stack for providing a sufficiently high release force that is higher than said low release force in the first adhesion zone to firmly adhere adjacent sheets in the stack together and thereby hold the stack of sheets together during handling, while affording continued peeling away of the uppermost sheet in the stack after initiating of such peeling along the first adhesion zone.

REFERENCES:
patent: 2170147 (1939-08-01), Lane
patent: 2248317 (1941-07-01), Van Cleef
patent: 2574152 (1951-11-01), Lewis et al.
patent: 2607711 (1952-08-01), Hendricks
patent: 3083393 (1963-04-01), Nappi
patent: 3373457 (1968-03-01), Rouch, Jr.
patent: 3575788 (1971-04-01), Funk et al.
patent: 4107811 (1978-08-01), Imsande
patent: 4128954 (1978-12-01), White

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