The control flap for continuously variable regulation of the quantitative distribution of keeping the context of two passage of air directed to one another to be mixed

摘要

1,124,077. Mixing flowing fluid streams. P. N. PAULUS. 26 Nov., 1965 [4 Dec., 1964], No. 50268/65. Heading B1C. [Also in Division F4] In a paint spraying installation fresh air from an entry 23 and recirculated air from a booth 1 are apportioned by a damper 7 before passing through a duct 24 to the booth. The damper is pivoted at 11 and comprises two parts 7a and 7b hinged to each other at 8. The part 7b has a catch 15 which when the damper closes the booth opening 4 engages a frame 9 of the opening. A cable 19 fixed to a drum 20 releases the catch and lifts the damper according to the proportions of air required. The drum may be operated manually by a crank 22, may be power operated, and may be programme operated. The booth 1 is supplied with fresh air only during spraying and with fresh and recirculated air during drying. The duct 24 includes a fan, a heater and a filter and leads to ceiling apertures in the booth. The booth has floor apertures leading to an air outlet and a fan which is operated for spraying and switched off for drying.