Abstract:
Disclosed is a paper feeding device (10) comprising a storage surface (14) for a stack of papers (12) adapted to be moved vertically. The device further comprises a vacuum feeder (16) for feeding papers from their position on the storage surface (14) and imparting on an uppermost sheet of paper (12a) a horizontal displacement, and a blower arrangement (18, 20) adapted to provide a curtain of air separating the uppermost sheet of paper (12a) from the rest of the stack of papers. The device further comprises an upper paper stop (26) displaceable between a lower position and an upper position, wherein, in the lower position, an underside of the upper paper stop (26) is aligned with an underside of the vacuum feeder (16), and wherein, in the upper position, the underside of the upper paper stop (26) is above the level of the side guides.
Abstract:
The invention relates to a device for individually feeding sheet-type printing materials (1) from a stack (5) to an entrance (82) of a transport path (84). Said device comprises a negative-pressure chamber (32), which is located above the stack (5) in the vicinity of the transport path entrance (82), a perforated, continuous transport belt (34) which is looped around the negative-pressure chamber (32) and a drive (38). According to the invention, the negative-pressure chamber (32) and the transport belt (34) co-operate in such a way that the latter can exert a negative pressure on the uppermost printing material sheet (1) of the stack (5) of sheet-type printing material (1), said pressure sucking the uppermost printing material sheet (1) against the transport belt (34) and conveying said sheet to the transport path entrance (84) by means of the drive (38) of the transport belt (34). The device (100) comprises a controller (50), which controls the drive (38) of the transport belt (34) in the transport direction (31, 80), in accordance with the length of the sheet-type printing material (1).
Abstract:
The invention refers to a suctioning and conveying system for suctioning and conveying an object comprising first means for generating a low pressure induced by a whirlwind for sucking in the object, the whirlwind having an axis of rotation, wherein the system comprises second means for conveying the suctioned object along a transfer path transverse to the axis of rotation of the whirlwind.
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:
La présente invention concerne un procédé d'introduction d'éléments en plaque de carton ondulé ou à micro-cannelure, dans une machine de transformation. Selon l'invention, un paquet d'éléments en plaque (32) est déposé sur un ascenseur (31) lors d'une phase de dépôt, l'ascenseur portant le paquet (32) monte progressivement lors d'une phase de montée, un effet vacuum est appliqué sur la surface supérieure de l'élément en plaque (35) au sommet du paquet (32) lors d'une phase de saisie et l'élément en plaque (35) saisi est transporté vers la machine de transformation lors d'une phase de transport. Optionnellement le procédé peut comprendre une phase non-stop et une phase de dépilage. L'invention concerne également un dispositif d'introduction (30) permettant de mettre en œuvre un procédé selon l'invention, comprenant un ascenseur (31), un dispositif de transport vacuum (34) et un contrôleur (33). Le dispositif (30) comprend optionnellement un dispositif non-stop (45) et un dispositif de dépilage (50). L'invention permet d'introduire des éléments en plaque de carton ondulé ou à micro-cannelure sans en détériorer le bord frontal ou la surface.
Abstract:
The invention refers to a suctioning and conveying system for suctioning and conveying an object comprising first means for generating a low pressure induced by a whirlwind for sucking in the object, the whirlwind having an axis of rotation, wherein the system comprises second means for conveying the suctioned object along a transfer path transverse to the axis of rotation of the whirlwind.
Abstract:
A document feeder includes a feed belt, a vacuum system, a drive system, and a separator arrangement. The feed belt defines multiple openings through the feed belt and the vacuum system provides a vacuum through the openings of the feed belt to draw a top document into contact with the feed belt. The separator arrangement provides a gas flow directed toward at least a first edge region of the top document to separate at least the first edge region of the top document from one or more documents immediately below the top document. Preferably, the separator arrangement utilizes the Coanda effect to separate the top document. The drive system rotates the feed belt.
Abstract:
In conjunction with an apparatus for seizing flat sheets on a stack of sheets arranged on a supply table (1), a sheet-separating device (10) is characterized by an air flow generator (15) and guide means (A,B) designed to direct a turbulent air flow produced by said generator (15) on at least one side of the stack of sheets. The guide means comprise, for example, a first tube (A) arranged so as to direct a flow of air produced by said generator (15) onto one side of the upper part of the stack of sheets (100) placed on the supply table (1) and a second tube (B) for directing an air flow produced by said generator (15) in the upper part of the free space (8) located under the sheet-seizing device (2).
Abstract:
Disclosed is a paper feeding device (10) comprising a storage surface (14) for a stack of papers (12), with a leading edge (14a), a trailing edge (14b), and a first and a second side edge (14c, 14d). The surface (14) is adapted to be moved vertically. The device further comprises a vacuum feeder (16) for feeding papers from their position on the storage surface (14) and imparting on an uppermost sheet of paper (12a) a horizontal displacement, and a blower arrangement (18, 20) adapted to provide a curtain of air separating the uppermost sheet of paper (12a) from the rest of the stack of papers. The device further comprises a sensor arrangement (22) arranged to determine where the upper paper sheets in the stack of papers (12) start to separate from the rest of the paper sheets, the sensor arrangement (22) comprising a plurality of infrared reflective sensors (22a).