Abstract:
A carriage drive system includes a timing belt pivotally anchored to a carriage. A drive motor rotates the timing belt, moving the carriage along a carriage path. The drive belt moves along a pair of pulleys. A first pulley is coupled to the motor's drive shaft. A second pulley is coupled to an idler spring. The idler spring determines the belt tension when the belt is stationary. Acceleration of the carriage alters the belt tension. A pivot connection occurs between the drive belt and the carriage. During acceleration, the pivotal connection rotates shortening the effective length of the belt, which in turn stretches the idler spring, and increases belt tension. While the carriage is at rest or moving at constant velocity, the pivot connection serves to reduce side load impact on the drive motor's shaft and windings. The pivot connection also isolates the carriage from high frequency vibrations.
Abstract:
A support rod is mounted to maintain straightness of a support surface of a printer. The support rod is used to preload the support surface in a direction opposite of an expected transverse load upon the support surface. The preloading supplied by the support rod counteracts a bending force on the support surface resulting from the expected transverse loading.
Abstract:
The spacing between the printhead of an inkjet printer cartridge and the print medium is dynamically controlled by an apparatus that slightly rotates the carriage that holds the cartridge. In one embodiment, the rotation is effected by actuation of a cam that resides between the rotatable carriage and a fixed part of the printer. The printhead-to-paper spacing is thus optimized for highest print quality.
Abstract:
An inkjet printing method of fixing ink to a print medium is disclosed. An embodiment of the method comprises depositing ink drops on a print medium with an inkjet printhead, the ink including a solvent and the print medium including a first surface. The method additionally comprises vibrating the print medium by applying ultrasonic energy to displace drops of the solvent to the first surface of the print medium to accelerate evaporation of the drops of solvent. An apparatus for use in an inkjet printing device is also disclosed. An embodiment of the apparatus comprises an ultrasonic source configured to apply ultrasonic energy to a print medium to displace drops of ink solvent to a first surface of the print medium thereby accelerating evaporation of the drops of solvent. An inkjet printing device including the method and apparatus is also disclosed. Further characteristics and features of the method and apparatus are described herein, as are examples of various alternative embodiments.
Abstract:
A modular duplex media handling system is used in conjunction with a simplex media handling print recording apparatus. The duplex media handling system is linked by a transmission to a print recording system drive motor. The drive motor drives feed rollers and metering rollers or the simplex media handling system. The transmission is media-activated to allow the duplex handling drive rollers to be disengaged, engaged for rotation in the same direction as the feed rollers, or engaged for rotation in the opposite direction as the feed rollers.
Abstract:
A media sheet is picked and moved along a media path toward a print zone. During the operation a media sensor detects whether the media sheet is properly oriented to receive print recording. For example, for glossy paper, photographic paper or letterhead there is a proper side of the paper for recording and a backside of the paper which typically does not receive print recording. If the proper side is not oriented to receiving print recording, then the media sheet is flipped by a modular duplex media handling system.
Abstract:
During first side printing, a media sheet is fed along a feed roller over a refeed guide toward a metering roller and into a print zone. As the trailing edge approaches a metering pinch line, the metering roller stops. After a drying time, the rollers reverse direction. The refeed guide directs the media sheet around the metering roller onto an inner guide having a reversible roller. When the trailing edge of the media sheet clears the refeed guide, the reversible roller is moved into contact with the metering roller causing such roller to reverse direction. The media sheet now moves back along the inner guide onto the feed roller. When the media sheet trailing edge is detected at the feed roller, the feed roller and metering roller change direction back to the original direction. The media sheet now is fed through the print zone for second side printing.