An inverter (1) for thin, flat products (2), especially printing substrates in a printing machine, with belts (7, 8) positioned over two deflection pulleys (3, 4, 5, 6) that are set together at 180.degree. between the deflection pulleys (3, 4, 5, 6). Such inverter is configured so that the product (2) and the belts (7, 8) move precisely in their reference positions. This is achieved by the fact that, in the transport direction (9), after a setting region (10) at least three guide rolls (11, 12, 13) are mounted on the supporting strand sides (7', 8') of belts (7, 8) in alternating arrangement and at least one of the guide rolls (11, 12 13) has a retaining collar (14) on at least one side and at least one guide roll (18) is arranged before the setting region (10). Further, at least one guide device (19, 20, 21) is arranged to guide product (2) to facilitate inversion.
CROSS-REFERENCE TO RELATED APPLICATION
This application is related to the following application filed on May 7, 2001: U.S. patent application Ser. No. 09/850,388, filed in the name of Norbert Neumann, and entitled, DEVICE FOR INVERSION OF SHEETS IN A PRINTING MACHINE.
Priority Data
May 18, 2000 [DE] 100 24 091 Dec 01, 2000 [DE] 100 59 913
The present invention provides an inkjet recording device for forming an image on a recording medium with an inkjet recording head. The inkjet recording device is provided with a conveyance section and a switchback section. One face of the recording medium is adhered to the conveyance section and the conveyance section transports the recording medium to the inkjet recording head. An image is formed on the other face of the recording medium, and the recording medium is transferred to the switchback section from the conveyance section, with the one face of the recording medium being adhered to the switchback section. The switchback section feeds the recording medium back to the conveyance section such that the other face of the recording medium can be adhered to the conveyance section.
There is provided an image forming apparatus capable of image forming on both surfaces of a sheet, having a first transfer portion which transfers an image formed at an image forming unit to a first surface of the sheet, and a second transfer portion which transfers an image formed at the image forming unit to a second surface of the sheet, wherein the sheet on the first surface of which the image is formed at the first transfer portion is conveyed to the second transfer portion while keeping a front of the image to a front in a conveying direction, and the sheet is conveyed while keeping an end portion in a width direction of the sheet conveyed through the first transfer portion and the end portion in the width direction of the sheet conveyed through the second transfer portion on same end portion side relative to the sheet conveying direction.
The present invention provides an apparatus for facing documents during high speed processing. The present invention employs at least one sensor to scan the documents individually as they are fed sequentially through a processing machine. The sensor determines the direction the documents are facing. Depending on the direction the documents are facing, a path selector directs the documents to one of two equal length paths within the processing machine. If a document is facing up, the path selector directs the document along a first path that leads directly to a collection point. If a document is facing down, the path selector directs the document along a second path that includes a twisted conveyor belt which turns the document about the longitudinal axis to face up. The second path meets with the first path, wherein the conveyor belt reinserts the faced documents back into the same sequential position that the document was in relative to the other documents before being diverted by the path selector.
A conveyor includes elongated and curved first and second structural beams. Each beam includes a plurality of support tabs projecting outwardly therefrom in opposite directions and the tabs support a corresponding endless belt along the entire length thereof. The two belts operatively connect to at least one drive mechanism and define a conveying path from a first end of the beams to the opposite end. The beams are oriented such that the spacing between the two belts remains relatively uniform along the conveying path. The size, shape, orientation, and spacing of the support tabs cause the endless belts to twist in orientation, preferably by about 180.degree. between entrance and exit ends of the conveying path. During driving of the belts, the belts cause an article held therebetween to change angular orientation as the belts convey the article from the entrance to the exit of the conveying path.
Guiding a printing medium that is being conveyed along a travel path in a printing machine, whereby the printing medium is not making contact along at least one edge. A stream of sucked air (9) is directed at least partially outward, with respect to at least one edge (5) of the printing medium. A printing media guide with at least one air suction mechanism (8) for sucking air out of the area of the travel path of the printing medium (1) in order to create a suction air stream (9) is directed at least partially outwards.
