Abstract: The present invention pertains to an arrangement for the controlled application of adhesive to substrate. In at least one embodiment, the arrangement comprises a) an adhesive reservoir, b) a pump, c) an applicator head having at least one applicator nozzle, d) a volume throughput sensor, and e) a monitoring unit. The reservoir, the pump, and the applicator head are connected together by a conduit system carrying the adhesive. The volume throughput sensor and the monitoring unit are connected together by a pulse transmission line. The monitoring unit, the feed pump, and the applicator head are connected together by control lines. In at least one embodiment, the application of adhesive to substrates is controlled by measuring the volume throughput of the adhesive, transmitting signals indicative of volume throughout to the monitoring unit, and controlling the amount of adhesive applied to the substrate material in-line in response to the signals.

Abstract: The present invention pertains to an arrangement for the controlled application of adhesive to substrate. In at least one embodiment, the arrangement comprises a) an adhesive reservoir, b) a pump, c) an applicator head having at least one applicator nozzle, d) a volume throughput sensor, and e) a monitoring unit. The reservoir, the pump, and the applicator head are connected together by a conduit system carrying the adhesive. The volume throughput sensor and the monitoring unit are connected together by a pulse transmission line. The monitoring unit, the feed pump, and the applicator head are connected together by control lines. In at least one embodiment, the application of adhesive to substrates is controlled by measuring the volume throughput of the adhesive, transmitting signals indicative of volume throughout to the monitoring unit, and controlling the amount of adhesive applied to the substrate material in-line in response to the signals.

Abstract: Trigger-operated hot-melt dispenser with positive-feed mechanism wherein at least one continuous feed-belt in axial contact with a rod of thermoplastic material and operated to urge said rod into the melt chamber of said hot-melt dispenser is characterized in that release of the trigger first reverses the feed-belt to withdraw the rod a pre-set amount away from the melt-chamber and after a pre-set interval moves the feed-belt transversely out of contact with the rod. This facilitates removal and replacement of a part-spent rod. Preferably the rate of the transverse movement is greater than the tracking speed of the belt. A preferred embodiment includes twin, parallel feed belts which together grip an intervening rod.

Abstract: A hot-melt dispenser or glue-gun is provided with a two-element sleeve at the inlet to the melt chamber, the elements being separated by a thermal barrier to reduce heat flow from that sleeve element in direct contact with the melt to the other sleeve element thereby inhibiting undue softening or even premature melting of the rod of thermoplastic composition held within the sleeve as it is fed to the melt.