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Modified Exit Tray for curled print media

IP.com Disclosure Number: IPCOM000200996D
Publication Date: 2010-Nov-03
Document File: 3 page(s) / 485K

Publishing Venue

The IP.com Prior Art Database

Abstract

Cut sheet printers usually have an exit (or output) tray where the printed sheets are delivered and stacked. Some exit tray designs have a curved bottom surface where the delivered sheets are desired to land and conform to the shape of the curve, as they are stacked neatly. This can cause problems stacking sheets if the delivered sheets are curled as a result of the printing process. One example of "print media" that is likely to experience this problem is "heavyweight label stock". In this case the sheets have sufficient beam strength to prevent bending in the shape of the curved bottom surface. This will result in collisions between previously delivered sheets and sheets just exiting the print process. The sheets, due to increased beam strength as a result of the curl, do not conform to the output tray blocking the exit slot of the printer. The next sheet crashes into the sheet in the tray, causing roll over and eventually pushing the material out of the tray. Such collisions result in problems stacking sheets. This idea proposes two specific solutions to that problem.

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Modified Exit Tray for curled print media

Cut sheet printers usually have an exit (or output) tray where the printed sheets are delivered and stacked.  Some exit tray designs have a curved bottom surface where the delivered sheets are desired to land and conform to the shape of the curve, as they are stacked neatly.  This can cause problems stacking sheets if the delivered sheets are curled as a result of the printing process.  One example of “print media” that is likely to experience this problem is “heavyweight label stock”.  In this case the sheets have sufficient beam strength to prevent bending in the shape of the curved bottom surface.  This will result in collisions between previously delivered sheets and sheets just exiting the print process.  The sheets, due to increased beam strength as a result of the curl, do not conform to the output tray blocking the exit slot of the printer. The next sheet crashes into the sheet in the tray, causing roll over and eventually pushing the material out of the tray.  Such collisions result in problems stacking sheets. This idea proposes two specific solutions to that problem. 

The two ideas are described on the following 2 pages.

One idea proposes to use flexible arms supporting an exit tray to allow for better stacking of heavyweight label stock exhibiting a high degree of both cross and process curl. When feeding curled label media, the flexible arms would be lifted and positioned at the optimum angle to improve stacking. The arms can be placed in the "non use" position of the Exit tray when not required by conforming them to the contour/profile of the exit tray.  The proposed idea would comprise an assembly utilizing two or three flexible arms that would conform to the profile of the exit tray. Attached to the top of these arms would be a flexible material to match the contour of the flexible arms. When printing normal paper stocks, the assembly would be moved downwards to match the profile of the exit tray. If label stock were run, the flexible plate would be moved by lifti...