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US 4,285,219 AGranted
Apparatus for treatment of laundry
AssigneeEngelhardt & Foster
InventorHeinz L. Grunewald
Life of this patent
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AssigneeEngelhardt & Foster
InventorHeinz L. Grunewald
Estimating the term…
A method is provided, along with apparatus for practice of the method, wherein laundry, such as linen or the like, is treated, following a washing operation applied thereto, by applying centrifugal force to extract rinsing liquid from a saturated laundry batch and then applying to the exterior of the laundry batch a pressurized fluid flow as a further treatment step, which is withdrawn from the laundry work batch from a point generally within the batch whereby rinsing liquid is withdrawn in a direction countercurrent to the preceding centrifugal extraction step. A suction may be applied at a point within the batch to either establish or enhance the liquid extraction operation. The apparatus of the invention includes a perforated spin-drying drum within a housing such that a circumjacent space is defined between the drum and the housing, and a remotely located blower in conduit communication with the housing generates a pressurized flow to the circumjacent space. The same blower may also be utilized to create a suction or negative pressure area within the drum, and the conduit from the blower, which is utilized to establish the suction in the drum, may also serve as a means of transporting laundry from the drum to other stations of the laundry treating system for subsequent treating steps.
An apparatus for treating laundry which utilizes a spin drying perforated drum disposed within a surrounding housing and wherein a circumjacent space is defined between the drum and the housing, the provision therewith of a fluid pressure source connected in flow communication with the circumjacent space to direct a pressurized fluid flow into the space and thence inwardly through the drum perforations, means for selectively curtailing the flow from the pressurized source, means for subjecting the interior of the drum to suction, the fluid pressure source being a compressed air source which is blower interconnected to the housing by an inlet conduit, an open end on the drum connected in communication with the outlet end of a laundry washing unit by means of a laundry transfer chamber, suction means for creating negative pressure within the drum, and the suctions means including an outlet conduit from the transfer chamber which leads to the intake side of a blower.
Dependencies are inferred from the claim text.