摘要:
A print medium sheet feeding system for an ink jet printer having a print head with a planar array of jets is provided by clamping the leading edge of a paper sheet after it is passed through a printing zone to a rotating assembly of parallel disks. The sheet is pulled through the printing zone by rotating a plurality of disks (14) with a clamp (50) being carried with the rotating drum (14c) formed by said disks (14). A platen (92) is provided which has a flat surface in the printing zone (56) forming a tangent to the outer surface of the rotating disks (14). The sheet is initially clamped against the drum (14c) by the combination of a lever arm (80) which is selectively engageable with the drum for rotation therewith and an attached actuating arm (72) having a plate (52) which secures a sheet to the drum surface. The resulting clamp (50) rotates with the drum (14c) until the sheet passes below idler rollers which are biased against the drum surface. These rollers then hold the sheet against the drum for motion of the sheet with the drum surface. The actuating arm is released from the drum after a sheer passes below the rollers, thereby allowing any sized sheet to be fed through the system.
摘要:
An ink jet printer (10) having a print head (14) for directing an ink jet toward a sheet of paper (16) includes automatic print head spacing apparatus (80) that holds the print head apart from the sheet of paper (16) by a preselected distance. In a preferred embodiment, the printer (10) includes a rotatable drum (20) for supporting the sheet of paper (16) and media securing system (24) of a first predetermined thickness for securing the paper to the drum (20). The print head (14) is positioned at the preselected distance after a major surface (130) of the print head (14) engages and is pushed back by the media securing system (24).
摘要:
A print medium sheet feeding system for an ink jet printer having a print head with a planar array of jets is provided by clamping the leading edge of a paper sheet after it is passed through a printing zone to a rotating assembly of parallel disks. The sheet is pulled through the printing zone by rotating a plurality of disks (14) with a clamp (50) being carried with the rotating drum (14c) formed by said disks (14). A platen (92) is provided which has a flat surface in the printing zone (56) forming a tangent to the outer surface of the rotating disks (14). The sheet is initially clamped against the drum (14c) by the combination of a lever arm (80) which is selectively engageable with the drum for rotation therewith and an attached actuating arm (72) having a plate (52) which secures a sheet to the drum surface. The resulting clamp (50) rotates with the drum (14c) until the sheet passes below idler rollers which are biased against the drum surface. These rollers then hold the sheet against the drum for motion of the sheet with the drum surface. The actuating arm is released from the drum after a sheer passes below the rollers, thereby allowing any sized sheet to be fed through the system.
摘要:
An ink jet printer (10) having a print head (14) for directing an ink jet toward a sheet of paper (16) includes automatic print head spacing apparatus (80) that holds the print head apart from the sheet of paper (16) by a preselected distance. In a preferred embodiment, the printer (10) includes a rotatable drum (20) for supporting the sheet of paper (16) and media securing system (24) of a first predetermined thickness for securing the paper to the drum (20). The print head (14) is positioned at the preselected distance after a major surface (130) of the print head (14) engages and is pushed back by the media securing system (24).
摘要:
A printer accurately controls the passage of print media (22) therethrough and maintains the print media taut as the print media passes through a printing zone (P) while the media is printed by an ink jet printer. The print media sheet is preferably carried by a rotating drum (40) in a first direction through the printing zone, with the drum being reversed to cause the exiting of the print media sheet from the printer. A pressure fixing or fusing apparatus (96) may be positioned to flatten ink spots on the print media as the print media exits from the printer. The pressure fixing or fusing mechanism is preferably used in the case of a hot-melt or phase-change ink jet printer.