Printer

Information

  • Patent Application
  • 20070144367
  • Publication Number
    20070144367
  • Date Filed
    August 31, 2006
    17 years ago
  • Date Published
    June 28, 2007
    17 years ago
Abstract
A printer of the present invention includes a print drum around which a master made by cutting a stencil is to be wrapped, an ink feeding device for feeding ink to the master wrapped around the print drum and a pressing member for pressing a sheet relatively to the print drum to thereby print an image on the sheet. The operator of the printer is capable of selecting either one of a usual print mode and a silence print mode that give priority to image quality and noise reduction, respectively.
Description

BRIEF DESCRIPTION OF THE DRAWINGS

The above and other objects, features and advantages of the present invention will become more apparent from the following detailed description taken with the accompanying drawings in which:



FIG. 1 is a sectional front view showing a preferred embodiment of the stencil printer in accordance with the present invention;



FIG. 2 is a block diagram schematically showing a control system included in the illustrative embodiment;



FIG. 3 is a flowchart demonstrating a specific procedure for establishing either one of a usual print mode and a silence print mode unique to the illustrative embodiment;



FIG. 4 is a flowchart showing specific processing for executing usual print mode operation included in the flowchart of FIG. 3;



FIG. 5 is a flowchart showing specific processing for executing silence print mode operation, particularly pressing force control, also included in the flowchart of FIG. 3;



FIG. 6 is a flowchart showing specific processing for executing the silence print mode operation of FIG. 3, particularly pressing force control and print speed control;



FIG. 7 is a flowchart showing specific processing for executing the silence print mode operation of FIG. 3, particularly pressing force control, print speed control and air volume control;



FIG. 8 is a schematic block diagram showing contents to be corrected in the silence print mode;



FIG. 9 is a flowchart demonstrating a specific correction procedure to be executed in the silence print mode;



FIG. 10 is a schematic block diagram showing an alternative configuration of the control system; and



FIG. 11 is a flowchart showing a specific alarm procedure available with the control system of FIG. 10.


Claims
  • 1. A printer comprising: a print drum configured to wrap a master produced from a stencil therearound;ink feeding means for feeding ink to the master wrapped around said print drum; andpressing means for pressing a sheet relatively to said print drum to thereby print an image on said sheet;wherein either one of a usual print mode and a silence print mode, respectively giving priority to image quality and noise reduction, is selectable.
  • 2. The printer as claimed in claim 1, further comprising pressure control means for varying a pressure force of said pressing means to act on said print drum, wherein when the silence print mode is selected, said pressure control means is operated in such a manner as to lower said pressing force.
  • 3. The printer as claimed in claim 2, further comprising blowing/peeling means for peeing off the sheet printed from said print drum with air, wherein when an amount of image represented by amount-of-image information input is smaller than a preselected reference value, at least one of the pressing force of said pressing means, an upper limit of a print speed and a volume of air to be sent from said blowing/peeling means in the silence print mode is corrected to a lower side.
  • 4. The printer as claimed in claim 2, further comprising blowing/peeling means for peeling off the sheet printed from said print drum with air, wherein when a kind of a sheet represented by kind-of-sheet information input is different from a preselected reference value, at least one of the pressing force of said pressing means, an upper limit of a print speed and a volume of air to be sent from said blowing/peeling means in the silence print mode is corrected to a lower side.
  • 5. The printer as claimed in claim 1, wherein in the silence print mode an upper limit of a print speed is varied to a lower side.
  • 6. The printer as claimed in claim 5, further comprising blowing/peeling means for peeling off the sheet printed from said print drum with air, wherein when an amount of image represented by amount-of-image information input is smaller than a preselected reference value, at least one of the pressing force of said pressing means, the upper limit of the print speed and a volume of air to be sent from said blowing/peeling means in the silence print mode is corrected to a lower side.
  • 7. The printer as claimed in claim 5, further comprising blowing/peeling means for peeling off the sheet printed from said print drum with air, wherein when a kind of a sheet represented by kind-of-sheet information input is different from a preselected reference value, at least one of the pressing force of said pressing means, an upper limit of a print speed and a volume of air to be sent from said blowing/peeling means in the silence print mode is corrected to a lower side.
  • 8. The printer as claimed in claim 1, further comprising: blowing/peeling means for peeling off the sheet printer from said print drum; andairflow control means for varying an volume of air to be sent from said blowing/peeling means;wherein in the silence print mode said airflow control means is operated in such a manner as to reduce the volume of air.
  • 9. The printer as claimed in claim 8, wherein when an amount of image represented by amount-of-image information input is smaller than a preselected reference value, at least one of the pressing force of said pressing means, an upper limit of a print speed and the volume of air to be sent from said blowing/peeling means in the silence print mode is corrected to a lower side.
  • 10. The printer as claimed in claim 8, wherein when a kind of a sheet represented by kind-of-sheet information input is different from a preselected reference value, at least one of the pressing force of said pressing means, an upper limit of a print speed and the volume of air to be sent from said blowing/peeling means in the silence print mode is corrected to a lower side.
  • 11. The printer as claimed in claim 1, further comprising: image quality estimating means for estimating an occurrence of blur of an image in accordance with at least one of kind-of-sheet information, amount-of-image information and environment information; andalarming means for alerting, if said image quality estimating means determines that blur of an image is likely to occur in the silence print mode, an operator of the printer to blur of an image before printing.
  • 12. A printer comprising: a print drum configured to wrap a master produced from a stencil therearound;an ink feeding device configured to feed ink to the master wrapped around said print drum; anda pressing member configured to press a sheet relatively to said print drum to thereby print an image on said sheet;wherein either one of a usual print mode and a silence print mode, respectively giving priority to image quality and noise reduction, is selectable.
  • 13. The printer as claimed in claim 12, further comprising a pressure control device configured to vary a pressure force of said pressing member to act on said print drum, wherein when the silence print mode is selected, said pressure control device is operated in such a manner as to lower said pressing force.
  • 14. The printer as claimed in claim 13, further comprising a blowing/peeling device configured to peel off the sheet printed from said print drum with air, wherein when an amount of image represented by amount-of-image information input is smaller than a preselected reference value, at least one of the pressing force of said pressing member, an upper limit of a print speed and a volume of air to be sent from said blowing/peeling device in the silence print mode is corrected to a lower side.
  • 15. The printer as claimed in claim 13, further comprising a blowing/peeling device configured to peel off the sheet printed from said print drum with air, wherein when a kind of a sheet represented by kind-of-sheet information input is different from a preselected reference value, at least one of the pressing force of said pressing member, an upper limit of a print speed and a volume of air to be sent from said blowing/peeling device in the silence print mode is corrected to a lower side.
  • 16. The printer as claimed in claim 12, wherein in the silence print mode an upper limit of a print speed is varied to a lower side.
  • 17. The printer as claimed in claim 16, further comprising a blowing/peeling device configured to peel off the sheet printed from said print drum with air, wherein when an amount of image represented by amount-of-image information input is smaller than a preselected reference value, at least one of the pressing force of said pressing member, the upper limit of the print speed and a volume of air to be sent from said blowing/peeling device in the silence print mode is corrected to a lower side.
  • 18. The printer as claimed in claim 16, further comprising a blowing/peeling device configured peel off the sheet printed from said print drum with air, wherein when a kind of a sheet represented by kind-of-sheet information input is different from a preselected reference value, at least one of the pressing force of said pressing means, an upper limit of a print speed and a volume of air to be sent from said blowing/peeling device in the silence print mode is corrected to a lower side.
  • 19. The printer as claimed in claim 12, further comprising: a blowing/peeling device configured to peel off the sheet printer from said print drum; andan airflow control device configured to vary an volume of air to be sent from said blowing/peeling device;wherein in the silence print mode said airflow control device is operated in such a manner as to reduce the volume of air.
  • 20. The printer as claimed in claim 19, wherein when an amount of image represented by amount-of-image information input is smaller than a preselected reference value, at least one of the pressing force of said pressing member, an upper limit of a print speed and the volume of air to be sent from said blowing/peeling device in the silence print mode is corrected to a lower side.
  • 21. The printer as claimed in claim 19, wherein when a kind of a sheet represented by kind-of-sheet information input is different from a preselected reference value, at least one of the pressing force of said pressing member, an upper limit of a print speed and the volume of air to be sent from said blowing/peeling device in the silence print mode is corrected to a lower side.
  • 22. The printer as claimed in claim 12, further comprising: an image quality estimating device configured to estimate an occurrence of blur of an image in accordance with at least one of kind-of-sheet information, amount-of-image information and environment information; andan alarming device configured to alert, if said image quality estimating device determines that blur of an image is likely to occur in the silence print mode, an operator of the printer to blur of an image before printing.
Priority Claims (1)
Number Date Country Kind
2005-372925 (P) Dec 2005 JP national