HP d640 HP D640 High-Volume Printer - User Manual (Printer and Accessories), C - Page 251

Using Paper General Guidelines Paper with Cutouts or Perforations Hewlett-Packard does not recommend using paper with cutouts or perforations because they often cause paper handling problems and may cause printer damage. A cutout is defined as any portion of the paper that has been removed, including binder holes, notches, square cuts, etc. Paper with internal perforations may cause misfeeds and paper jams. If you must use papers with internal perforations or cutouts, take care to conform to the following: • Cutouts and perforations should be punched from the side to be printed on, so that edge trimmings will not scratch the photosensitive belt. • Do not print at a cutout location, or closer than 1/8 inch (3.5 mm) to the edge of a cutout, to prevent toner from contaminating the inside of the printer. • Cutouts and perforations should be cut clean (without burrs), to avoid multiple feed, contamination problems, or paper jams. • Avoid perforations that run perpendicular to the paper path. When the printer transfers paper from one set of rollers to the next, a perforation can cause the page to bend downward and miss the pickup point on the next roller. Chemically Treated Paper Coatings such as lacquers, polymers, laminations or other chemicals protect the paper but can cause problems in the fuser and transfer areas of D640 printers. The surface resistivity and moisture content can be greatly altered, resulting in print quality problems. Hard surfaces coatings increase wear on the rollers and paper guides. All chemically treated paper must meet HP specifications for fusing compatibility. Synthetic Paper Synthetic papers (those manufactured from man-made fibers) do not perform as well as bond papers in any printer, especially D640 printers. Each type has its own problems which result in poor feed and print quality performances. All synthetic papers must follow HP specifications, especially for caliper and fusing compatibility. Be cautious about heat-generated fumes which may be dangerous to breathe. Coated Paper Do not use papers where a coating has been added after the paper is produced. Most coated paper does not meet specifications for fusing compatibility, as well as all other specifications for D640 printers. Using Paper D-15