Glue application method for cold seal cohesive packaging

A method for applying a cold seal adhesive, the method comprising the steps of:

• delivering a cold seal adhesive to a nip between a rotating metering roller and an adjacent rotating transfer roller having a transfer surface;
• transferring a quantity of adhesive to the transfer surface;
• rotating the transfer roller whereby the transfer surface contacts a printing die mounted to a rotating die roller disposed adjacent to the transfer roller, whereby at least a first portion of the quantity of adhesive is transferred from the transfer surface to the printing die;
• feeding a housing between the die roller and an adjacent rotating impression roller, wherein the housing comprises an interior surface, an opposing exterior surface, a top portion, a bottom portion, and at least one adhesive region on the interior surface, and wherein the impression roller is capable of supporting the exterior surface of the housing, whereby simultaneous rotation of the die roller and the impression roller advances the housing therebetween;
• rotating the die roller whereby the printing die contacts the at least one adhesive region on the interior surface of the housing and transfers at least a second portion of the quantity of adhesive from the printing die to the at least one adhesive region forming a film as the housing advances between the die roller and the impression roller, the film having a thickness between 0.0015-0.007 inches;
• and
• drying the adhesive on the housing;
• wherein the adhesive is a latex-based adhesive, with a viscosity of no more than 450 centipoise, which adheres to the housing when applied in a liquid form but is capable of drying such that the dried adhesive lacks tackiness and is cohesive only to itself when compressed with a pressure of at least 10,000 pounds per square inch.