Book binding process
AssigneeH. B. Fuller Company
InventorRobert M. Hume, III
Life of this patent
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Abstract
A continuous book binding process and a book comprising a backbone made by the process. The process comprises forming a book block, applying a wet coating of a primer composition to the spine area of the block, thermally drying said coating to remove a substantial amount of water to provide a flexible film having a uniformly irregular surface, and applying a coating of a hotmelt adhesive over the film, wherein the primer composition comprises an adhesive latex and an amount of ungelatinized granular starch effective to complex the latex water so that it is evaporated in a diffuse manner during the drying step. The layer of hot melt adhesive is not disturbed by the evaporation of residual water from the primer film.
Claims14
A continuous book binding process comprising:
- forming a book block having a spine area;
- coating the spine area with a primer composition comprising an adhesive latex and an amount of ungelatinized granular starch effective to complex a major portion of the latex water so that the water is evaporated in a diffuse controlled manner during the subsequent drying step;
- thermally drying said coating to evaporate a substantial amount of said water and to form a flexible primer film having a uniformly irregular surface;
- applying a layer of a liquid hot-melt covering adhesive to said flexible film at a temperature of about 150.degree.-200.degree. C., wherein the residual water released from said primer film by said applying does not disturb the integrity of said covering adhesive layer;
- and
- cooling said covering adhesive layer to a tacky, coherent film.
Dependencies are inferred from the claim text.