Carpet seaming iron

Details Carpet seaming iron Carpet seaming iron

2005-05-03

2005-05-03

Evans, Robin O. (Department: 3742)

Electric heating

Heating devices

Combined with pressure application means

C219S245000, C219S251000

Reexamination Certificate

active

06888102

ABSTRACT:
A carpet seaming iron has two heating elements to maintain the iron at desired temperature with a minimum of temperature oscillation. One element remains energized as long as the iron is switched on, while the other is controlled by a thermostat. With proper selection of the power of the first heating element, the iron achieves a very steady, minimally-oscillating temperature by cycling the second element on and off in response to actual iron temperature during use, supplementing the first element as needed. Larger oscillations such as exhibited with single-element thermostat-controlled irons are avoided by the relatively smaller power of the second element, the only element cycled on and off, even when the thermostat is mechanical.

REFERENCES:
patent: 4829157 (1989-05-01), Loyd
patent: 5210394 (1993-05-01), Kerremans
patent: 5252806 (1993-10-01), Hudson
patent: 5384001 (1995-01-01), Hoopengardner
patent: 5944943 (1999-08-01), Kwok et al.
patent: 6172335 (2001-01-01), Goodrich
patent: 6263596 (2001-07-01), Pedron et al.
patent: 6421939 (2002-07-01), David et al.

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