Incremental printing of symbolic information – Ink jet – Controller
Reexamination Certificate
1997-03-10
2001-02-20
Barlow, John (Department: 2853)
Incremental printing of symbolic information
Ink jet
Controller
C347S104000, C400S630000, C400S642000
Reexamination Certificate
active
06189990
ABSTRACT:
CLAIM OF PRIORITY
This application makes reference to, incorporates the same herein, and claims all benefits accruing under 35 U.S.C. §119 from an application entitled Apparatus For Leaving Space Between Paper And Head of Ink-jet Printer earlier filed in the Korean Industrial Property Office on Mar. 8 1996, and there duly assigned Serial No. 96-4297 by that Office.
BACKGROUND OF THE INVENTION
1. Field of the Invention
The present invention relates to an apparatus for leaving space between paper and a head of an ink-jet printer. In particular, the present invention relates to an apparatus preventing the head from inappropriately staining paper with ink by preventing inadvertent contact between the paper and the head.
2. Discussion of Related Art
There are various kinds of paper for printing, such as papers of elasticities of 24 pounds, 20 pounds (regarded as being strong paper) and 16 pounds (regarded as being weak paper). When a paper with weak elasticity is used as a print medium, the head may inappropriately stain the paper with ink. On this matter, exemplars of the contemporary art include U.S. Pat. No. 5,366,301 issued to Martin et al. discussing “a system for use in an ink-jet printer having a printhead and an opposing platen capable of movement toward and away from the printer's printhead to define a record media gap therebetween.” The system has a record media detector
24
. The detector “includes mounting bosses
24
a
which are captured by hinge member
22
b
so as to pivotally mount the detector to record media guide
22
. U.S. Pat. No. 4,682,188 issued to Castellano discusses “a head [which] comprises a closed container carrying internal and external electrodes and a nozzle and is mounted removably on a carriage on which it is held by a permanent magnet in such a way that the head bears with the external electrode against a metal sheet.” A protuberance “adjacent to the nozzle” presses against the metal sheet “which in turn presses the paper against a platen.” The protuberance establishes “the jet-to-paper spacing.” U.S. Pat. No. 5,608,430 issued to Jones et al. discuss “a print head tilt angle positioner [which] includes a scroll cam, a tilt arm, a flexure, a tilt angle adjuster, and a biasing spring.” This is part of a machine “to control the distance of the print head from the image receiving drum.” U.S. Pat. No. 5,576,744 issued to Niikura et al. discuss “a recording apparatus for recording information with a recording head having a plurality of recording elements while keeping a designated distance between the recording head and a recording medium [which] has an information acquisition device for acquiring distance information between the plurality of recording elements and the recording medium.” U.S. Pat. No. 5,515,094 issued to Tanaka et al. discuss “a leaf plate [which] is disposed in abutment, through a guide path of printing paper, with a feed roller whose peripheral surface is in contact with the guide path.” By bringing the transported printing paper to the projections, “thus, the distance between the nose portion of the ink jet head and the printing paper in the printing position is made uniform and the quality of printing is improved.” U.S. Pat. No. 5,393,151 issued to Martin et al. discuss “a printer mechanism to control pen-to-print medium spacing during printing.” The platen includes ribs adapted for “reducing uncontrolled bending of the print medium in the print zone.” The ribs “preferably extend parallel” to a direction of travel of the print medium. From my study of these exemplars of the contemporary practice and the art, I find that there is a need for an improved and effective apparatus preventing the head from inappropriately staining paper with ink by preventing inadvertent contact between the paper and the head.
SUMMARY OF THE INVENTION
Accordingly, the present invention is directed to an apparatus for leaving space between paper and a head of an ink-jet printer that substantially obviates one or more of the problems due to limitations and disadvantages of the related art.
The present invention relates to an apparatus for leaving space between paper and a head of an ink-jet printer. In particular, the present invention relates to an apparatus preventing the head from inappropriately staining paper with ink by preventing inadvertent contact between the paper and the head.
An object of the present invention is to provide an apparatus for leaving maximum space between paper and a head of an ink-jet printer, which can prevent the head from being stained with ink on the paper with weak elasticity even if the back part of the paper is raised as the paper is discharged out of the paper discharge roller.
Additional features and advantages of the invention will be set forth in the description which follows, and in part will be apparent from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.
To achieve these and other advantages and in accordance with the purpose of the present invention, as embodied and broadly described, the present invention has a construction that the paper between the deflector guide and the guide roller is made not to be raised by a paper insertion angle change rib, and then passes along the head with space between the paper and the head enough to be in no contact with the head, the deflector guide being installed at the front side of the head. In other words, the paper insertion angle change rib is mounted in front of the guide roller so that the paper may not be raised and uniform space between the paper and the head may be attained.
It is to be understood that both the foregoing general description and the following detailed description are exemplary and explanatory and are intended to provide further explanation of the invention as claimed.
REFERENCES:
patent: 4682188 (1987-07-01), Castellano
patent: 5366301 (1994-11-01), Martin et al.
patent: 5393151 (1995-02-01), Martin et al.
patent: 5515094 (1996-05-01), Tanaka et al.
patent: 5527123 (1996-06-01), Jackson et al.
patent: 5564847 (1996-10-01), Patrick et al.
patent: 5576744 (1996-11-01), Niikura et al.
patent: 5594486 (1997-01-01), Kiyohara
patent: 5608430 (1997-03-01), Jones et al.
patent: 5738454 (1998-04-01), Zepeda et al.
patent: 4316870 (1992-11-01), None
Barlow John
Bushnell , Esq. Robert E.
Hallacher Craig A.
Samsung Electronics Co,. Ltd.
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