Ing C. Olivetti C., S.p.a.

Olivetti Lexikon S.p.a.

Daniele Mazzini

Alessandro Crotti

Mario Manzone

Roberto Foglino

A device (21) for selectively feeding sheets (24, 28) contained in two separate trays (22, 26) by means of a pick-up unit (31), wherein the latter is located between the two trays (22,26). The latter-named (22, 26) are fulcrum-mounted on a structure (33) and are driven alternatively by a motor (61) depending on the latter's direction of rotation so as to be brought selectively into sliding engagement with the pick-up unit (31), and accordingly result in one sheet at a time being picked up and fed from one or the other of the two trays (22, 26). The device (21) is particularly suitable for incorporation in an office machine, such as for example a facsimile system (20) or a printer, for selectively feeding sheets of different types.

Device for selectively feeding sheets from two trays in an office machine

An electronic typewriter (11) has a line spacing device (29) for rotating a platen roller (16) and a transport device (28) for moving a printing carriage (19) in both directions. The line spacing and transport devices are driven from a single motor (32) via an intermediate gear (40) mounted on a shift member (35). The shift member (35) is displaceable between two operative positions for connecting a driveshaft (33) to the transport device (28) or to the line spacing device (29). A servomechanism (36) which is motorized by the shaft (33) displaces the shift member (35) between the two positions by means of a shift electromagnet (81) which actuates a lever (79) to lock the gear (40) by means of teeth (88) on a slide member (43). Positioning means (44) hold the shift member (35) in each of the two operative positions, and an electronic control means (22) controls the motor (32 ) and the electromagnet (81). The system is of low cost, and is simple, functional and reliable.

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Caluso, Italy

Daniele Mazzini