Patent GB-595566-A (GB)
Title: Improvements in compression liquid extractors or wringers
IPC: D06F47/00
Filed: 1945-05-24
Abstract: 595,566. Straining-presses. BURGESS, A. F. (Huebsch Manufacturing Co.). May 24, 1945, No. 12995. [Class 46] [Also in Groups VIII and XXIX] Apparatus for extracting liquid from laundry articles, brewery mash and other semi-solid materials, of the kind in which a flexible diaphragm is forced by fluid pressure to compress the articles or material against a casing, has a flexible bag lying within a casing having an open end to which the bag is attached and above the end an extension is fitted with an open end closed by a cover, means being provided to admit fluid pressure below the bag to displace it into the extension, the extension and cover being apertured to allow the expressed liquid to escape. The casing has a grooved rim 2 between which and the extension 15, with apertures 17, is clamped the rim of the bag 10, a mating groove being formed in the clamping ring base 13 of the extension which is secured by screws 14. The casing is mounted in a frame 18 with an extension wall 19 which, with a partition 20, forms a drainage space for the expressed liquid which is led away through a drain pipe 22. The cover has a rim 23 to which the top 24 is secured and a foraminous lining 25 is spaced from a top plate by spacers 27, the lining fitting over the extension 15, the space above the lining communicating with the space 21. Secured to the wall 19 is a top ring 28 and an inwardly flanged semi-cylindrical locking ring 29 is secured to one-half of the ring 28. Another inwardly flanged semicylindrical locking ring 30 is secured to one half of the rim 23 of the cover. The flange 31 of the ring 29 fits over one half of the ring 23 when the cover is closed, and a flange 32 of the ring 30 under the top ring 28. The cover has brackets 35 in which are journalled wheels 34 to run on fixed rails 33 as the cover is moved into shut or open position. Pressure fluid supply and drain pipes are connected to a valve 5 which is operated by a lever 9 to apply fluid pressure through a pipe 4 below the bag 10 and to release it. In a modification specially adaptable for extracting liquid from semi-solid materials such as brewery and distillery mash, the casing 41, Fig. 6, of the drainage space is fitted with trunnions 42, one of which has a gear 105 engaged by a toothed segment 106 with a crank 108 operable by a hydraulic motor 110 for tilting the casing 41, 36 from the loading and liquid extracting position shown in full lines, to a position shown in broken lines where the dehydrated material is emptied into a hopper 126. The bottom pipe 39 has a tapered end to fit into a tapered flexible rubber coupling 44 on the pipe 40 connecting to the pressure supply valve 77 and drain valve 75. Both these valves are closed by springs 79 and opened by solenoids 80. The cover 56 is run to closed or open position by a hydraulic motor 99, the valve 102 of which is closed by a spring 103 and opened by a solenoid 104. The valve 112 for the tipping motor 110 is closed by a spring 113 and opened by a solenoid 114. The casing is charged from a hopper 69 through a tube 70 with a butterfly valve 71 at the top operated by a hydraulic motor 85 under control of a valve 87 closed by a spring 88 and opened by a solenoid 89. The shut-off valve at the bottom of the tube is of the form shown in Fig. 5, a flexible rubber diaphragm 72 being moved to open or close the tube by a threaded plunger 94 engaging a nut 93 attached to a gear 92 driven by a reversible rotary hydraulic motor 90 controlled by a valve 96 actuated by a solenoid 98 and spring 97. The hydraulic supply circuit for the valves includes a suitable pressure pump 116 and feed chamber 117. A timing switch 81 in circuit with all the solenoids ensures the correct sequence in operation. To ensure fluid tightness between the apertured extension wall and the foraminous plate of the cover, an endless rubber tube 54, Fig. 8, fits in an annular recess in the top rim 52 of the wall and is supplied with highpressure fluid, simultaneously with the raising of the bag, through a pipe connected to the pipe 39, thus preventing escape of expressed liquid. For spent mash the apertured wall of the casing and cover are covered with a filter cloth, screen, or other filtering element attached by clamping rings and screws.