Starting and stopping continuous-feed thermomolding machine

Details Starting and stopping continuous-feed thermomolding machine Starting and stopping continuous-feed thermomolding machine

2005-10-06

2009-12-29

Cozart, Jermie E (Department: 3726)

Metal working

Foil or other thin sheet-metal making or treating

C029S017200, C110S186000, C110S191000, C432S008000, C432S010000, C432S011000, C392S417000, C250S515100

Reexamination Certificate

active

07636992

ABSTRACT:
In a continuous-feed thermomolding machine a foil is advanced in a transport direction at a constant travel speed through a heat station where it is exposed to a heat source such that each piece of the foil is exposed for a predetermined residence time. When the machine is stopped, a shield is positioned in the station between the foil and the source so that substantially no heat is imparted to the foil from the source. The machine is started by accelerating the foil to the travel speed while simultaneously and synchronously accelerating the shield opposite to the travel direction such that, as the shield fully retracts from the station, the foil reaches the travel speed and, before the shield has fully retracted from the station, every piece of the foil in the station exposed by the retracting shield is exposed to the source for the residence time.

REFERENCES:
patent: 4209957 (1980-07-01), Utzmann
patent: 4883419 (1989-11-01), Queirel
patent: 5647923 (1997-07-01), Buescher
patent: 1145784 (1963-03-01), None
patent: 2745422 (1978-04-01), None
patent: 3234506 (1984-03-01), None
patent: 198 50 143 (2000-05-01), None

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