Apparatus for welding heat sealable sheet material
Abstract
Abstract AN APPARATUS FOR WELDING HEAT SEALABLE SHEET MATERIAL WITH HEATED FLUID MOVING THROUGH A PLATEN HAVING A CHAMBER. THE CHAMBER IS CLOSED WITH A FLEXIBLE, NONELASTIC, THIN COVER HAVING A SURFACE AREA EXPOSED TO THE CHAMBER THAT IS LARGER THAN THE TRANSVERSE AREA OF THE CHAMBER, WHEREBY THE COVER IS MOVED BY THE PRESSURE OF THE FLUID IN THE CHAMBER WITHOUT ELONGATING OR DEFORMING THE COVER TO TRANSMIT FORCE AND HEAT TO A SURFACE OF THE SHEET MATERIAL. THE COVER IS URGED TOWARD THE SHEET MATERIAL BY THE HEATED FLUID UNDER PRESSURE WHICH TRANSMITS BOTH HEAT AND PRESSURE TO THE SHEET MATERIAL TO WELD THE MATERIAL. THE PLATEN MAY BE PROVIDED WITH FLUID IN A VAPOR PHASE TO PROVIDE THE PLATEN WITH TOTALLY UNIFORM PRESSURE ON THE COVER WHICH ADJUSTS TO THE IRREGULARITIES ON THE SURFACE OPPOSING THE COVER. THE VAPOR ALSO MAINTAINS, THROUGH CONDENSATION OF THE VAPOR, A UNIFORM SURFACE TEMPERATURE ON THE COVER. THE CONDENSED LIQUID IS RETURNED FROM THE CHAMBER BACK TO A VAPOR GENERATING SOURCE.
Inventors
- 👤 John E Eichenlaub
Bibliographic Details
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