Dispensing – Automatic control – Delivery from source controlled by quantity in discharging...
Patent
1986-01-08
1989-02-14
Rolla, Joseph J.
Dispensing
Automatic control
Delivery from source controlled by quantity in discharging...
222 63, 2221465, 2221466, B67D 562
Patent
active
048041106
ABSTRACT:
A dispenser is described for extruding a hot melt adhesive obtained by melting a rod of adhesive in a normally closed pressurized melting chamber. The rod is supplied from a remotely located spool through a flexible conduit to an inlet of the dispenser. A seal is placed at the inlet and is cooled by a flow of air so as to maintain the shape of the rod at the seal, prevent its deformation, and inhibit the leakage of melted adhesive back through the seal. A friction drive is used in the vicinity of the spool to push the rod into the melting chamber. A movable section is provided for the melting chamber to absorb expansion of the melted adhesive and a sensor is used to inhibit feeding of the rod when the chamber section expands and enable feeding when it is in a contracted position. A foamable adhesive rod is described wherein an unblown foaming agent is incorporated in the rod and activated in the melting chamber of the dispenser. Several embodiments are described.
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Article: "Crosslined PE Foam Sheet: New Continuous Process Arrives" by: Carl Kirkland in: Plastics Technology, Nov. 1980, pp. 89-92.
Bladyka Paul J.
Sperry Charles R.
Pedersen Nils E.
Rolla Joseph J.
Sperry Charles R.
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