Abstract:
A device in a postage meter that uses dot or drop printing to enhance security. Security is achieved by counting the number of signal pulses that are used to produce ink drops or ink dots that are required to produce the entire document or specific regions of the document. The aforementioned may be accomplished by adding a smart module to digital print head modules. The smart module would capture driver pulses from the print head module and interpret the pulses associated with regions of the image. Thus, the smart module would take data from the printer controller that is used to cut off printing when the ink is consumed and relate “set” values to the drops produced during the production of the document or portions of the document, thereby linking the document to the actual volume of ink produced.
Abstract:
The invention relates to a method and an apparatus for firing the nozzles on an ink jet print head cartridge that requires a reduced number of data lines between the ink jet print head cartridge and the printer electronics. A group data line provides serial group select data that is stored in a set of group select latches on the ink jet print head cartridge and identifies a particular group of nozzles on the ink jet print head. A primitive data line provides primitive select data that is stored in a set of primitive select latches on the ink jet print head cartridge and identifies a particular nozzle in the selected set of nozzles. A first clock line provides a first clock signal that is used to advance the group select data and the primitive select data into the group select latches and primitive select latches respectively. The group select data and the primitive select data is decoded to produce firing data which is advanced to a set of firing latches in accordance with a second clock signal that is provided on a second clock line. The data in the firing latches is logically ANDed or NANDed with a firing pulse provided on a firing line in order to expel a drop of ink from the selected nozzle or nozzles on the ink jet print head cartridge.
Abstract:
A recorder like an ink jet printer includes a head unit, which includes recording head and a head holder. Intermediate members are screwed to the holder. Each of the recording heads is bonded to one of the members and has a number of ink ejection nozzles. After the unit is assembled, one of the heads may be found to be defective. Even in this case, it is possible to remove only the defective head and the associated member, fit a new intermediate member to the holder, and bond a new recording head to the new member with the nozzles of this head aligned with the nozzles of the other heads. The intermediate member has a hole engaging with part of the head with play for positioning the head relative to the holder.
Abstract:
A system and associated method for forming three-dimensional objects under computer control and from a material which may be rendered flowable and then dispensed on a layer-by-layer basis. The layers of the material solidify or otherwise physically transform upon being dispensed thereby forming successive cross-sections. The dispensing process is repeated whereby successive layers adhere to each other thereby forming the object.
Abstract:
An ink jet recording element including a support having thereon, in the order recited, a base layer including a hydrophilic or porous material and a porous, ink-receptive top layer capable of accepting an ink jet image having a polymeric adhesive binder and thermally-activated adhesive polymeric particles, a particle-to-binder ratio being between about 95:5 and 70:30, and wherein both the binder and a polymer used to make the adhesive polymeric particles have: a) a tensile strength at break of greater than about 1 MPa; b) an elongation at break of greater than about 10%; c) a tensile modulus of greater than about 1 MPa; and d) a Tg of less than about 50° C.; and the polymeric particles also having a particle size of less than about 10 &mgr;m and a Tm or softening point of greater than about 50° C.
Abstract:
An ink-jet printing apparatus which can print an image without causing bleeding or feathering with effectively using an ink and realize high quality image comparable with silver film photograph, and is convenient for use, can be provided. It enables printing in a first printing mode using a printing head unit ejecting yellow, magenta and cyan inks, respectively and a printing head unit ejecting a black ink and a printing quality improving liquid, and a second printing mode using the printing head unit ejecting yellow, magenta and cyan inks, respectively, and a printing head unit ejecting the black ink and cyan and magenta inks having lower density than that of the cyan and magenta ink.
Abstract:
An ink jet recording method forms an ink jet image on a recording medium by serially moving an ink jet recording head having a plurality of ink discharge ports arranged in an array along a conveyance direction of the recording medium. The method includes the step of providing a platen having a planar section upstream in the conveyance direction and a slant section slanted downstream in the conveyance direction and in a direction parting from the ink discharge ports, opposed to an array of the ink discharge ports when the ink jet recording head serially moves. The method further includes the step of forming an ink jet image on the recording medium by ink discharge from the ink discharge ports when the ink jet recording head moves at least three times across a same area of the recording medium, a reverse side of which is supported by the platen.
Abstract:
Plain paper is processed through a plain paper optimizer system prior to image formation on a recording surface. The optimizer system adds a fixing fluid during application of pressure and, optionally, heat to the paper surface. The surface contacted by the fixing fluid is enhanced, forming images of improved print quality. In one embodiment, plain paper is treated in an optimizer system, which has a heat and fuser assembly with silicone oil as the fixing fluid, and is transported into the print zone of an ink jet printer. Images printed on the treated surface demonstrate improvements in image quality manifested by reduction of both edge raggedness and intercolor bleeding.
Abstract:
A printer and a method for producing precise registered images are provided. The method in the printer is carried out by an included sheet transport and control assembly for moving a sheet of paper along a sheet path through a printing zone. The sheet transport and control assembly includes drive device; a moveable sheet carrying web member having a first edge and a second edge having an array of precision holes, including adjacent holes spaced a precise distance apart, formed through at least the first edge and the second edge. The sheet transport and control assembly also includes a programmable controller connected to the drive device, and a dual sensor assembly mounted along the sheet path and connected to the programmable controller for responsively generating and inputting precision hole position signals to the programmable controller. The dual sensor assembly includes a first sensor for generating a first increasing and decreasing signal, and a second sensor for generating a second increasing and decreasing signal that increases and decreases oppositely relative to the first signal. The programmable controller controls the moving device to move and stop the web member responsively to a desired value of a ratio of the first signal to the second signal, thereby ensuring precise moving and stopping of a sheet of paper on the web member through the printing zone.
Abstract:
The present invention provides an image forming apparatus includes a recording head to record an image on a sheet and having a carriage for shifting the recording head in a sheet width-wise direction, a convey rotary member for conveying the sheet past the recording head and for discharging the sheet after recording, a support for supporting one surface of the sheet, and a shift device for shifting the support between a support position where the sheet is supported above a discharge portion and a retard position where the sheet is not supported by the support. The shift device is switched in accordance with a position of the carriage and has a transmission for effecting ON/OFF of a driving force for rotating the convey rotary member.