METHOD FOR DUPLEX PRINTING ON CONTINUOUS WEB PAPER
Original Publication Date: 1984-Jun-30
Included in the Prior Art Database: 2004-Apr-04
Xerox Disclosure Journal
In devices for copying, duplicating and printing, an architectural choice is the selection of paper type, either sheet or continuous web fed. Cut sheet has advantages in ease of loading, flexibility for changing paper weights and types, and ability to use formatted paper, i.e., letterhead, prepunched forms. However, the inherent paper path reliability is not as good as that of web-fed paper. Web-fed paper is generally either roll fed or fanfold. Both, however, carry with them a disadvantage of wasting paper in leaders (and/or trailer) when used for short jobs or intermittently. Roll fed paper is also awkward to load, with heavy paper rolls and requires guillotine cutting on the output. Fanfold paper normally uses sprocket feed, and requires bursting and decollation. However, the registration capability provided by the sprockets allows forms printing. For a combination of these and other reasons, cut sheet is currently used on most copiers and duplicators, and short run lithographic printers. Fanfold supplies, which allow asynchronous operation, have become the choice for impact electronic printers. Roll fed paper is used for high volume lithographic presses and for some electronic printers.