Abstract:
A sheet feeding apparatus and an image forming apparatus that can reduce the collision sound when a sheet abuts against a feeding roller and suitably form an image on the sheet are provided. A variable speed unit 19 receives the driving of a drive unit to make a tooth-missing large gear of a sheet feed tooth-missing stage gear 12 mesh with a small gear 13c of an input stage gear 13 rotating at a constant speed, to thereby rotate a rotating shaft 6 of the feeding roller 3 and a cam 11 at a first speed to lift an intermediate plate 9. Thereafter, if a sheet stacked on the intermediate plate 9 is pressed against the feeding roller 3, the variable speed unit 19 makes a large gear 13b of the input stage gear 13 and a tooth-missing small gear of the sheet feed tooth-missing stage gear 12 mesh with each other, so that the rotating shaft 6 of the feeding roller 3 is rotated at a second speed faster than the first speed to rotate the feeding roller 3 at a fast speed.
Abstract:
Il s'agit d'un dispositif (1) et d'un procédé de formation d'une boîte d'emballage (2, 74) à partir d'au moins un magasin (3) de stockage d'une pile (4,68, 69) de découpes en carton ondulé, comprenant des moyens (6) d'avancée de la pile au fur et à mesure de son dépilage et des moyens (7) de dépilage des découpes par aspiration. La pile de découpes étant verticale, les moyens (6) d'avancée de la pile comportent un plateau (8) élévateur de la pile verticalement jusqu'à un plan (9) de prise pour la découpe (28) du dessus. Le dispositif comporte des moyens (27) de repérage en X, Y, Z de la position (p i ) de la découpe (28) du dessus dans le magasin et des moyens (29) de calcul de la trajectoire en x, y, z, comportant une composante verticale, des moyens de dépilage en fonction de la dite position (p i ) agencés pour commander le déplacement desdits moyens de dépilage entre une position de saisie (9) de la découpe et une position de positionnement sur un poste de travail déterminé également repéré en X, Y, Z.
Abstract:
Means (17,22, 23,24,25) is provided for intermittently lifting a stack (13) of paper so that the topmost sheet is captured by the suction of a traction device (15) and carried forward by the endless belt of the latter to the input end (21) of a laminating machine. Before the trailing end of the captured sheet has left the traction device (15) the lifting means again lifts the stack (13) so that the next sheet is captured in an overlapping relation to the first.
Abstract:
A plate stock detection apparatus for detecting plates remaining on a plate pallet (13) on an automatic plate pallet loading system (18) configured to load plates into an imaging device, which includes a plate pallet adaptor (11). The plate pallet is placed on top of the adaptor; and plate pallet stock detectors (15, 16, 21, 31) measure plates left on the plate pallet. A plate pallet elevation system (12) elevates the plate pallet in response to feedback plate pallet stock detectors.
Abstract:
A lifting unit and a process for lifting a stack of sheets having at least a first support (20, 120, 220) and at least a second support (22, 122, 222) are described. The first support defines a first con- toured or flat support surface, and the second support defines a second support surface which has a substantially horizontal, flat main surface. In the lifting unit at least one unit is provided for lifting the first and second supports. During operation the supports are lifted such that at least a highest point of the first support is kept elevationally above the second support, the second support is lifted more quickly than the first support, and the substantially horizontal, flat main surface of the second support is kept in its horizontal alignment. The lifting unit is described,in combination with a sheet feeder.
Abstract:
A sheet feed mechanism for a device such as a printer, with a chassis (2) configured to support a stack of sheets (4). A top sheet engaging member (6) for engaging the top-most sheet (40) of the stack and moving it relative to the remainder of the stack (4). A stack engaging structure (8) for engaging the stack (4) and biasing its top sheet (40) against the top sheet engaging member (6). The stack engaging structure (8) having a friction surface (18) extending parallel to the stack engaging structure's direction of travel. A lock mechanism (12) mounted to the chassis (2) for limited relative movement thereto, the lock mechanism (12) having a biased contact foot (32) for engaging the friction surface (18) to secure the stack engaging structure (8) to the lock mechanism (12) for movement therewith. An actuator (20) mounted to the chassis (2) to disengage the contact foot (32) from the friction surface such that the stack engaging structure (8) moves relative to the lock mechanism (12) to press the top-most sheet (40) against the top sheet engaging (6), then the actuator disengages the contact foot (32) such that it re-engages the friction surface (18) and then moves the lock mechanism relative to the chassis (2) such that the stack engaging structure (8) also retracts a predetermined distance from the top-most sheet engaging member (6).