Patent GB-617615-A (GB)
Title: Improvements in or relating to laundry hydro-extractors of the press type
IPC: D06F47/04
Filed: 1946-04-03
Abstract: 617,615. Wringers. BERGER. M. M. April 3, 1946, No. 10365. [Class 138(ii)] A wringer of the press type comprises a box-like structure 10 having an extracting chamber in the upper part thereof, an access opening fitted with a movable closure 17 in the front of the chamber, a plate 16 forming the top of the chamber, a receptacle 25 removably supported beneath the extracting chamber and having a loose bottom member 26 positioned therein. a vertically-operating squeezing member 29 positioned in the lower portion of the structure for lifting the bottom member 26 and the contents of the receptacle into squeezing engagement with the plate 16, and a horizontally-operating pushing member 24 adapted, after the operation of the squeezing member 29, to remove the squeezed goods laterally from the chamber through the access opening. The walls and top of the structure 10 may be formed of steel channels 15, the front wall being closed by a hinged door 17 adapted to be locked in closed position by a hinged latch 22 co-operating with keepers 21. The squeezing member 29 is constituted by a hydraulic ram disposed in a pit 11 below the floor 12 on which the receptacle 25 runs. The receptacle 25, which is constructed as described in Specification 617,616, is wheeled into the structure 10 through the open front wall of the latter, after which the door 17 is closed and the ram 29 raised so that its face plate 30 lifts the bottom plate 26 towards the plate 16. The front and back walls of the receptacle are provided with out-turned brackets 28 which register beneath the back channels 15 and lower edge of the door 17 so as to hold the receptacle against movement with the ram 29 and bottom plate 26. The pressing member 24, which is also in the form of a hydraulic ram is disposed immediately beneath the plate 16, and is adapted, after the ram 29 has been raised and then partially lowered, to move its face plate 23 forwardly so as to discharge the compressed laundry articles through the front of the structure, the door 17 having been opened. Corrugated plates, which have their corrugations disposed vertically, are arranged at the sides of the structure below the extracting chamber in order to provide for the rapid drainage of water from the compressed laundry articles. Additional plates having their corrugations disposed horizontally are provided at the sides of the extracting chamber for the purpose of retaining the compressed formation of the Jaundry articles during their discharge by the ram 24. The two rams 24, 29 are included in an hydraulic circuit comprising fluid reservoirs 36, 37 and two electricallydriven pumps 31, 32, each associated with one of the rams. At the start of the extracting operation, after positioning the receptacle 25 in the structure, the pump 31 is energized so that fluid passes to the ram 29, the face plate 30 of which then lifts the bottom plate 26 towards the plate 16. When the pressure applied by the ram reaches a pre-determined amount, a cutout switch in a pressure gauge 47 automatically stops the pump 31. A valve 43 is then operated so as to open the return line 41, 48 of the ram 29, whereby the latter drops until the bottom plate 26 just engages inside the top of the receptacle and is in a position immediately beneath the face plate 23. To stop the ram 29 in this position, a normally-open valve 49 in the return line 48 is closed by means of a cam 51 depending from the face plate 30. The door 17 is then opened, and the pump 32 energized in order to deliver fluid to the ram 24, whereby the face plate 23 moves forward to discharge the compressed laundry articles into a receptacle. The ram is then reversed by the opening of suitable valves, and, thereafter, the pump 32 is stopped and a foot pedal 55 depressed so as to operate a valve 54 in order to open the return line 41 and allow the ram 29 to return to its normal position.