Sealing head for machines for heat treating threads
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United States of America Patent
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app pub date -
Aug 9, 2006
filing date -
Sep 1, 2005
priority date (Note) -
Abandoned
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Abstract
The present invention relates to a sealing head for machines for heat treating threads, comprising a frame (1) fixed to a pressurised chamber through which a conveyor belt passes, a pair of horizontal rollers (2 and 3) placed on top of each other and pressed against the opposite faces of the conveyor belt and of seals (4 and 5) to form a sealed closure between the rollers (2 and 3) and the frame (1), at least one (2) of the horizontal rollers (2 and 3) and the seals (4 and 5) being connected to the corresponding movement actuators (6 to 8). Sealing head characterised in that the actuators (6 to 8) of the horizontal roller or rollers (2 and/or 3) and the seals (4 and 5) between the rollers (2 and 3) and the frame (1) are in the form of pneumatic actuators without pistons, namely of the balloon or bellows type.
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