Dry transfer sheets

Details Dry transfer sheets Dry transfer sheets

1974-01-18

1977-08-09

Lesmes, George F.

Stock material or miscellaneous articles

Structurally defined web or sheet

Discontinuous or differential coating, impregnation or bond

96 28, 156240, 427152, 428195, 428200, 428202, 428914, B32B 300, B32B 706

Patent

active

040412040

ABSTRACT:
A photosensitive sheet product which enables dry transfer sheets to be made very simply by a process involving photographic exposure, water-washing to remove unexposed parts of the photosensitive material and drying. The photo-sensitive material itself contains the resin or other adhesive present in the letters or other transferable images and the problem of the adhesiveness which would be apparent in the transferred characters or pictorial matter in the product is solved by making the dry transfer sheet with a temporary keycoat which transfers with the characters or pictorial matter and remains as a protective layer on the finished product. Another advantageous feature of the dry transfer sheets described is that they can be formulated so as to be pressure-transferable in the normal way or alternatively can be heated or solvent-treated to exhibit a permanently increased adhesiveness, making broad-area transfer possible using much lower transfer pressures than required in normal use.

REFERENCES:
patent: 3353955 (1967-11-01), Colgrove
patent: 3660088 (1972-05-01), Lundsager
patent: 3736138 (1973-05-01), Held
patent: 3764318 (1973-10-01), Laridon
patent: 3770438 (1973-11-01), Celeste
patent: 3775113 (1973-11-01), Bonham et al.
patent: 3928710 (1975-12-01), Arnold et al.

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