Apparatus for manufacturing adhesive covers

Apparatus for manufacturing adhesive covers comprising:

• feed means for feeding pre-cut cover material into the apparatus;
• transport means moving said cover material forwardly in an edgewise direction;
• scoring means for making score lines on the cover to define a backbone on the cover structure;
• pre-warming means for removing excess moisture from the cover backbone;
• hot melt adhesive applicator means for applying adhesive to the cover backbone;
• and
• cooling means for cooling the molten adhesive below its tack point,
• said hot melt adhesive applicator means being a rotary applicator including a plurality of discharge nozzles and a pivotal mounting means having an axis generally transverse to the direction of movement of the cover material about which axis said rotary applicator may be rotated to bring each of said discharge nozzles successively into position for extruding hot melt adhesive onto the moving cover material, said extrusion die being adapted to be pivotally flipped away from the cover material and substantially forward in the direction of movement of the moving cover material as cessation of adhesive flow occurs to effect breaking of an adhesive tail created during the adhesive applying process.

Apparatus for manufacting adhesive covers, said cover having a backbone portion to which hot melt adhesive is applied, said apparatus comprising:

• feed means for feeding cover material into the apparatus;
• transport means moving said cover material forwardly in an edgewise direction;
• scoring means for making score lines on the cover material to define a backbone on the cover;
• pre-warming means for removing excess moisture from the cover backbone;
• hot melt adhesive applicator means for applying adhesive to the backbone portion of the cover material;
• said hot melt adhesive applicator means comprising an extrusion die having at least one discharge nozzle, said extrusion die being rockably mounted about a pivot axis substantially spaced from the transport means and generally transverse to the direction of movement of the cover material whereby said at least one discharge nozzle may be flipped away from the cover material as cessation of adhesive flow occurs with the component of movement of said at least one discharge nozzle in the direction of movement of the forward moving cover material being substantially greater than its component of movement away from the cover material thereby breaking the adhesive thread created during the adhesive applying process and displacing it in said forward direction;
• and
• cooling means for cooling the molten adhesive below its tack point.

Apparatus for manufacturing adhesive covers comprising:

• feed means for feeding pre-cut cover material into the apparatus;
• transport means moving said cover material forwardly in an edgewise direction;
• scoring means for making score lines on the cover material to define a backbone on the cover material;
• pre-warming means for removing excess moisture from the cover backbone;
• hot melt adhesive applicator means for applying adhesive to the cover backbone;
• said hot melt adhesive applicator means comprising a pivoting extrusion die having at least one discharge nozzle, said extrusion die being pivoted about a pivot axis located generally transverse to the direction of movement of the cover material and further from said transport means than the distance between a normal to the transport means passing through the pivot and the point of application of adhesive whereby the nozzle is pivotally flipped away from the cover material substantially forward in the direction of movement of the moving cover material as cessation of adhesive flow occurs to effect breaking of the adhesive tail created during the adhesive applying process and displacing the tail forwardly;
• and
• cooling means for cooling the molten adhesive below its tack point.