초록 ▼

A mechanism for attaching to a laminated plastic sheet a fastener profile wherein the preformed sheet is removed from a roll and passed through a heating chamber having controlled humidity and thereafter passing said sheet over a roll which forms a joining zone with an extruded plastic profile strip

A mechanism for attaching to a laminated plastic sheet a fastener profile wherein the preformed sheet is removed from a roll and passed through a heating chamber having controlled humidity and thereafter passing said sheet over a roll which forms a joining zone with an extruded plastic profile strip fed onto the sheet with a jet of air directed thereagainst, and the joined sheet and strip thereafter passing through a chamber where the strip is cooled and the heat in the sheet is maintained.

대표청구항 ▼

A mechanism for forming sheets having strip means thereon comprising in combination: means for supplying a continuous sheet of plastic film; means heating the sheet in a preheating chamber to a predetermined temperature sufficient to permit fusion to a plastic strip but less than the deterioration t

A mechanism for forming sheets having strip means thereon comprising in combination: means for supplying a continuous sheet of plastic film; means heating the sheet in a preheating chamber to a predetermined temperature sufficient to permit fusion to a plastic strip but less than the deterioration temperature of the film; means connected for controlling the temperature in said preheating chamber so that the sheet is heated to fusion temperature; an extruder for extruding a heated plastic strip having a small critical profile; means defining a joining zone adjacent the extruder wherein the newly extruded strip is immediately fed onto the surface of the heated sheet while the plastic is hot so that the strip is fused to the sheet; and air jet means of a width to limit air flow onto the strip and profile for increasing its rate of cooling while said sheet remains heated.