A rubber screen for use in a vibrating sieve for separating smaller particles of a substance from larger particles thereof, which screen comprises a body having a plurality of apertures and containing reinforcing members embedded therein and oriented laterally to the flow direction of the substance being sifted. An abrasion-resistive coating may be applied to one or both surfaces of the rubber screen.

A screen mat having a moulded elastomeric body and at least one elongated tensioning member extending through said body along a path remote from the side edges of the body, the member or members being intended to tension the screen mat in use to restrain flexibility of the body, and in which the body comprises a screen part having substantially parallel upper (screening) and lower (underside) surfaces between which the apertures of the screen communicate and at least one rib which is integral wi...

Integrally formed, elastomer screen units having a multiplicity of sorting apertures therein are provided for longitudinal and transverse connection in multiples to form screen bodies for sizing and sifting fragmented, hard-stock materials, each unit comprising a generally rectangular, preferably integral construction having upper and lower surfaces and first and second edges. The shaping of the first edge is preferably complemental to the shaping of the second edge and the same complemental rel...

Screening apparatus, particularly vibratory screening apparatus, includes a screening surface formed of one or more plates of flexible non-metallic material having apertures therethrough, with a plurality of attachment bars projecting from the underface of the or each plate at intervals along the length thereof. Each attachment bar extends across the width of the plate, and the plate or plates are supported by a support structure which includes a plurality of spaced support bars provided at inte...

Screen assemblies for a vibratory separator, the screen assemblies in certain aspects having at least two screening members, the at least two screening members connected by sewing material, and methods for making such screen assemblies.

A screen assembly for a conventional vibratory screening machine includes a series of screens bonded to a rigid rectangular metal frame having rectangular tubular frame members and at least two and no more than ten intermediate frame members. This leaves a series of permeable areas through the screen assembly that are in the range of 2-32% of the overall area of the screen assembly. The screens include an upper fine mesh screen which passes particles below a predetermined size and rejects partic...

An image formation apparatus has a first feeder for feeding a copy sheet from a container containing a number of copy sheets therein, a second feeder for feeding a copy sheet supplied manually thereto. Both feeders feed the copy sheet to an image formation station, and a scanner exposure-scans an original image to form a copy image, a first detector detects the size of manually supplied copy sheets and a second detector detects the size of the copy sheets in the container, a controller controls ...

A copying apparatus includes an automatic original conveyer, an original size detection sensor, a scanning optical system for transferring an image from an original to a photosensitive element, and a control portion for transmitting electrical command signals to the separate elements and control operation of the conveyer in accordance with an operaional program. When a smaller-size original is detected by the size detection sensor, control signals are generated to the conveyer which shorten the ...

An image forming apparatus capable of feeding or transporting recording medium of different sizes through the image forming path. A discriminating device determines whether or not a recording medium has reached a predetermined position in the transport path and a detecting member detects the recording medium a predetermined time thereafter to identify the size of the recording medium. If the recording medium is detected within the predetermined time, it is identified as being of a particular siz...

An image forming apparatus for forming an image on a photosensitive medium, is provided with an image forming device having reciprocable member for applying image light to the photosensitive medium, a detector for detecting that the reciprocable member is located at a predetermined position in the reciprocating path thereof, signal generator for generating a signal indicating the size of image formation, and a control, responsive to the detector and the signal generator, for selecting the detect...