Abstract: A device (10) for extracting and feeding sheets from two trays, comprising a first tray (20) to contain a first ream (21a) of sheets (21), a second tray (30) to contain a second ream (31a) of sheets (31), and a feeding member (50, 53, 53a, 53b) for extracting and feeding one sheet (21, 31) at a time from said first ream (21a) or from said second ream (31a), wherein the two trays (20, 30) are positioned one on top of the other on the same side of the feeding member (50), and the second tray (30), in an intermediate position between the first tray (20) and the feeding member (50), comprises a fixed wall (32, 32a, 32b), to support the second ream (31a), which is configured in order to define an opening or cooperation zone (41) between the first tray (20) and the feeding member (50), so that, when the second ream is not present in the second tray (30) the feeding member (50, 53, 53a) and the first ream (21a) are intended to cooperate in contact with each other, through said cooperation zone (41) in order to extra

Abstract: A device (10) for extracting and feeding sheets from two trays, comprising a first tray (20) to contain a first ream (21a) of sheets (21), a second tray (30) to contain a second ream (31a) of sheets (31), and a feeding member (50, 53, 53a, 53b) for extracting and feeding one sheet (21, 31) at a time from said first ream (21a) or from said second ream (31a), wherein the two trays (20, 30) are positioned one on top of the other on the same side of the feeding member (50), and the second tray (30), in an intermediate position between the first tray (20) and the feeding member (50), comprises a fixed wall (32, 32a, 32b), to support the second ream (31a), which is configured in order to define an opening or cooperation zone (41) between the first tray (20) and the feeding member (50), so that, when the second ream is not present in the second tray (30) the feeding member (50, 53, 53a) and the first ream (21a) are intended to cooperate in contact with each other, through said cooperation zone (41) in order to extra

Abstract: 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.

Abstract: 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.