In-line cold foil transfer process and apparatus
First Claim
1. In a printing apparatus which normally includes a plurality of printing stations for applying ink to a continuous web and a plurality of heating stations for generating enough heat to substantially dry ink applied to the web, the improvement wherein at least one of said printing stations applies a water-based, self-cross-linking co-polymer adhesive to the web that cures in ambient conditions and does not exhibit cold flow, wherein at least one of said heating stations applies heat sufficient only to initiate curing of the adhesive which has been applied to the web;
- said improvement also comprising a roll leaf disposed downstream of said one printing station, unheated pinch rollers arranged in-line with said printing stations and said heating stations, for pressing the roll leaf against the web with a pressure sufficient to transfer colored material from the roll leaf to the adhesive which has been applied to the web and which is undergoing curing, the transfer of the colored material being carried out continuously without the application of heat at a constant speed between 150-300 feet/minute.
4 Assignments
0 Petitions
Accused Products
Abstract
An improved apparatus and method employ a printing press which normally includes a plurality of printing stations and a plurality of heating stations. An adhesive, rather than ink, is applied to a continuous web at at least one of the printing stations and heat is subsequently applied to the web at at least one of the heating stations in order to initiate curing of the adhesive. Roll leaf is pressed against the web with a pressure sufficient to transfer colored (i.e., metallic or non-metallic) material from the roll leaf to the adhesive which has been applied to the web and which is undergoing curing.
58 Citations
14 Claims
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1. In a printing apparatus which normally includes a plurality of printing stations for applying ink to a continuous web and a plurality of heating stations for generating enough heat to substantially dry ink applied to the web, the improvement wherein at least one of said printing stations applies a water-based, self-cross-linking co-polymer adhesive to the web that cures in ambient conditions and does not exhibit cold flow, wherein at least one of said heating stations applies heat sufficient only to initiate curing of the adhesive which has been applied to the web;
- said improvement also comprising a roll leaf disposed downstream of said one printing station, unheated pinch rollers arranged in-line with said printing stations and said heating stations, for pressing the roll leaf against the web with a pressure sufficient to transfer colored material from the roll leaf to the adhesive which has been applied to the web and which is undergoing curing, the transfer of the colored material being carried out continuously without the application of heat at a constant speed between 150-300 feet/minute.
- View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14)
Specification