GB386711A - Improvements in and relating to rotary-chamber drying machines - Google Patents

Abstract

386,711. Air-filters. CHERRY TREE MACHINE CO., Ltd., Cherry Tree, and DOWELL, G., 7, York Terrace, Shear Brow, both in Blackburn. Sept. 10, 1931, No. 25367. [Class 8 (ii).] In a rotary drying-machine for the drying of goods by means of a current of warm dry air, the screen for removing particles of fluff from the air leaving the machine is cleansed by a wiper or squeegee so connected with the mechanism for rotating, starting, stopping, or opening and closing the revolving chamber that the one cannot be operated without the other. Preferably, the normal operation of the said mechanism automatically moves the wiper over the screen, but the manual moving of the wiper may be an essential preliminary to the operation of said mechanism, or the wipers may continuously pass over the screen under the influence of a rotating part of the machine. In one form of the apparatus, a rotary cylinder c has an air inlet b and outlet e, the air passing through a screen a between the aperture d and outlet e. The wiper or wipers j are carried on bars i attached to arms h fitted to a shaft f so linked to the main door c<1> of the machine that on opening the door, the shaft moves the wiper down over the screen and removes the fluff; on closing the main door, the wiper bar is moved upwards to the original position. In a similar way, the wiper may be coupled to the starting lever. In another form, the main door cannot be opened until the wiper has been moved from top to bottom of the screen, and cannot be closed until the wiper has been returned. The wiper bar i may itself be rotatable, being so connected to the shaft f that on moving the shaft, the bar and brush are rotated in a direction opposite to that caused by rolling on the screen. In another form, the wiper is moved to and fro by a link attached to a ratchet wheel driven from the main trunnion of the revolving cylinder.