Importance

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Abstract

For drying coatings of solvent-based adhesive applied to shoe bottoms a through-flow drying apparatus is provided which utilises air at ambient temperature for the constant rate period (i.e. the period during which the surface of the coating is 'wet'), and thereafter applies infra-red heating during the falling rate period (i.e. the period when migration of the solvent through the solid adhesive is to be achieved). In the first stage, jets of air are directed against the shoe bottom at a velocity of not less than 15 meters/second (measured at the inlets (38)), while at the heating station a plate heater (42) of a size which is larger than the area of the shoe bottom is provided. Ideally, when the shoe is removed from the apparatus, an outsole having a reactivated coating of adhesive can be located with the shoe bottom and bonded thereto, without reactivation of the shoe bottom adhesive itself. Also disclosed is a shoe support (46) for supporting shoes of a wide range of sizes with little or no need for adjustment, said support comprising a plurality of pairs of shoe-engaging rolls (60, 62, 64) between which the downwardly depending portions of the shoe last can be accommodated.

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First Claim