초록 ▼

For liquefying hot melt adhesive, a hopper is provided at its lower region with one or more discrete upwards projections (for example a single, fluted cone), with means for heating the projection(s). In use, a unitary mass of hot melt adhesive is lowered into the hopper to become supported on the pr

For liquefying hot melt adhesive, a hopper is provided at its lower region with one or more discrete upwards projections (for example a single, fluted cone), with means for heating the projection(s). In use, a unitary mass of hot melt adhesive is lowered into the hopper to become supported on the projection(s), as a result of which the unitary mass is progressively melted and the melted adhesive flows from the bottom of the hopper.

대표청구항 ▼

A method of liquefying hot melt adhesive, comprising upturning a cylindrical drum filled with a unitary mass of solidified adhesive, lowering the upturned drum into a closely fitting upright cylindrical hopper until it is supported by the mass of adhesive resting on a single, central, upwardly proje

A method of liquefying hot melt adhesive, comprising upturning a cylindrical drum filled with a unitary mass of solidified adhesive, lowering the upturned drum into a closely fitting upright cylindrical hopper until it is supported by the mass of adhesive resting on a single, central, upwardly projecting cone in a lower region of the hopper, applying heat through the upright hopper wall and thus through the drum wall to the adhesive to preheat the latter, applying heat to the cone to progressively melt the adhesive, the adhesive and drum falling progressively under gravity alone, and causing the adhesive to flow out of said lower region of the hopper.