Abstract: Compositions comprising graphene sheets and at least one metal having an anodic index of no greater than about ?1.0 V. Disclosed is are coatings comprising compositions comprising graphene sheets and at least one metal having an anodic index of no greater than about ?1.0 V. Also disclosed is an object or structure coated at least in part with a coating comprising graphene sheets and at least one metal having an anodic index of no greater than about ?0.7 V and methods of coating objects and structures.

Abstract: The introduction device includes a supply tray (6) with a front wall (9), in which a pile of sheets (14) is biased towards driving rollers (17) by the action of a support plate (12) and a spring (16). The front wall (9) is provided with an extension (30) of which one portion forms a fixed sloping plane (31) provided with three openings (34). Three leaf springs (35) are fastened on one side of the supply tray and have at their other end a curved part (36)engaged into the openings (34). These springs (35) form with the sloping plane (31) a retaining member (40) of which the slope is variable depending on the rigidity of the sheets or envelopes to be introduced, the slope being small in the case of thin sheets and greater in the case of rigid sheets or envelopes, thus ensuring a sheet by sheet introduction which is reliable.

Abstract: A printer having a printing head provided with a plurality of printing elements disposed substantially along a line, a cylinder supporting a print sheet such as a sheet of paper held by an edge clamp and an ink ribbon changer. Four ink ribbons, for example, are contained each in a cartridge removably attached to a support and indexing mechanism. The support and indexing mechanism of ink ribbons and providing an accurate multi-color printing.

Abstract: A sheet feed device for a printer or typewriter having a plurality of cassettes supporting stacks of sheets to be printed, a sheet removal mechanism associated with each cassette for removing a sheet from the cassette and positively driving the removed sheet to a position for feeding it into the printer, and a selection mechanism for actuating a selected one of the sheet removal mechanism.

Abstract: The multicolor thermal printer comprises a frame (1), a platen (4) and a carriage (2) that can move along the platen (4). This carriage (2) consists of a lower part (5) carrying the thermal print head (3) and an upper part (6) hinged to the part (5) thanks to a hinge pin (7a). The upper part (6) carries four inking ribbons (31) located on levels of height increasing from the front to the rear so that the inking ribbons are arranged in a vertically offset fashion on the ribbon guides (40). By pivoting of the upper part (5), the ribbons can be placed successively opposite the heating elements (3a). A drive mechanism (53 to 68) for the ribbons is made so as to drive only the ribbon placed opposite the heating elements (3a) and only when the carriage (2) is moved in the direction of printing.By this design, a fast change of the printing color and a reduced consumption of inking ribbons can be attained.

Abstract: The cassette comprises a bottom (25) and four side walls (26 to 29) comprising on their upper edge holding elements (14) for the sheets. These sheets are placed on a support plate (41) held near one of the corners (33) in contact with the bottom (25). Three springs (44 to 46) pull the plate (41) in the direction of the holding elements (14). A locking mechanism (50) consists of a sliding part (51) comprising near its ends two openings (54) able to work with two flathead pins (52) solid with the plate (41) to hold the latter against the bottom (25) in the vicinity either of the corner (31), or of the diametrically opposite corner (32). The same cassette can thus be introduced in the lengthwise or widthwise direction, which makes possible a saving in cassettes and in sheets.

Abstract: The sheet feed device (1) comprises several cassettes (13) on which the sheets are stacked, a removal mechanism associated with each of the supports, intended to remove a sheet from the cassette (13) and introduce it into the printer (2), and a selection mechanism (55) intended to activate one of the removal mechanisms. The mechanisms for removal and selection (55) are driven by the platen (3) of the printer (2). The selection mechanism (55) makes use of the position occupied by the mobile carriage (4). The latter carries a drive part (61) that can work with a set of selection levers (56). These levers (56) are equal in number to the removal mechanism. Depending on the position of the carriage during selection, one or the other of the levers (56) is put into active position and moved by a drive wheel (65) to activate a removal control element (76) and to start the removal and introduction processes.

Abstract: The sheet feed device (1) comprises several cassettes (13) on which the sheets (11) are stacked, a removal mechanism, associated with each of the supports, intended to remove a sheet from the cassette (13) and introduce it into the printer (2), and a selection mechanism intended to activate one of the removal mechanisms. This selection mechanism consists of a guide part (72) comprising several tracks (73 to 75) and a selection lever (56) made to engage with the top of guide part (72). When the platen (3) of the printer (2) turns in the direction opposite the direction of introduction of the paper, the selection lever (56) is driven in the same direction. After a rotation of a predetermined angle, greater than two turns of the platen, the direction of rotation is reversed. The lever (56) follows one of the tracks (73 to 75) to activate one of the removal control parts (76 to 78) and to start the removal and introduction process.

Abstract: A decimal tab mechanism for a typewriter of the type having a printing element carried by a carriage comprises a tab bar 1 capable of being displaced longitudinally and comprising a series of tab blades 2 which may be separately selected. A stop 19 of bar 1 is capable of cooperating with a decimal tab stop 67 placed in active position from an assembly of decimal tab stops 67.Said mechanism further comprises an apparatus 28, 35-41 for driving bar 1 longitudinally ahead in the direction of typing, a cam 28 for the placing in active position of the selected tab blades 2 before longitudinal displacement of tab bar 1, and connection means 50-62 between a drive shaft 29 and the assembly of decimal tab stops 67 comprising devices 51, 53, 54 for assuring that a selected decimal tab stop 67 is placed in active position only after longitudinal displacement of tab bar 1.

Abstract: In the typewriter driving of the platen (1) is effected by the motor shaft (3) which operates a character selection device. This motor shaft (3) and the platen (1) occupy predetermined angular positions at rest.During a driving command of the platen, a part (26) brings a transmission pinion (22) into mesh with the last controlled pinion (9) of a gear train (5 to 9) coupled to the motor shaft (3) before this shaft is actuated by the motor (4). The transmission pinion (22) is secured to one end of the transmission shaft (16, 19, 20) and the other end of the shaft carries a toothed wheel (15) in mesh with a driving pinion (14) secured to the platen. The angular notching of the pinions and their number of teeth is provided in such a manner that the teeth of the pinion (22) engage exactly between the teeth of the controlled pinion (9).

Abstract: A shock absorption thrust mechanism includes a thrust piece (19) which is used as a stop for a moving body in motion. This thrust piece 19 is prone to displacement under the effect of kinetic energy of the moving body, against the action of a spring (20) and a shock absorber (21). The displacement of the thrust piece (19) depends on the kinetic energy of the moving body under shock, which is prejudicial particularly with respect to typewriters, where this displacement occurs in the stop position of the moving body or ensures the control of a function. In order to obtain a constant displacement of the thrust piece (19), the mechanism includes a driving device (10, 24) which moves the thrust piece (19) in a predetermined movement, the driving device (10, 24) acting jointly with the moving body on the thrust piece (19).