Famous Patents
William F. Semple, a dentist, was awarded the first US Patent on chewing gum in 1869. His recipe contained powdered chalk.
PatentStorm News
Make the Most of Our Site
See this month's Top Inventors and Most Cited Patents.
Stay on top of the latest innovations by subscribing to an RSS feed.
Registered users: Manage your profile.
| Number | Title | Issue Date |
| 7265771 | Printer capable of detecting status of unutilized ribbon A printer includes a ribbon supply end, a ribbon retrieving end, and a ribbon. The two ends of the ribbon are installed on the ribbon supply end and the ribbon retrieving end respectively. The printer further includes a print head, a print medium fixture, a driving ... | 09/04/2007 |
| 7214897 | Illuminated keyboard with illuminated patterns displayed on top surface of keyboard An illuminated keyboard with illuminated figures being formed on the top surface of the keyboard including: a top cover, a bottom cover, a plurality of keys and an electroluminescent board. The top cover accommodates the keys and is combined with the bottom cover. T... | 05/08/2007 |
| 7059788 | Printer media comprising a bar code A printer and printer media are provided. The printer comprises a media support for receiving a print media. The media support includes a bar code reader. The media comprises a printable media and a bar code disposed on the media. ... | 06/13/2006 |
| 6669386 | Adjusted capacity level indicator A print engine (10) having a maximum physical sheet capacity (MAX_C), and being operable at an operational sheet capacity (OP_C) equal to or less than the maximum physical sheet capacity, includes a marking device (12) which applies marks to sheets of med... | 12/30/2003 |
| 6629787 | Apparatus and method for adjusting a head gap of an inkjet printer An apparatus for adjusting a head gap of an inkjet printer includes: a main frame; an eccentric shaft rotatably disposed on the main frame, and including an eccentric supporting shaft; a head assembly movably disposed on the eccentric shaft, and including... | 10/07/2003 |
| 6464417 | Method and apparatus for print media detection A multi-purpose, transmissive paper sensor includes a light beam projector and light detector having an analog output signal. Changes in the output signal from an open loop condition indicate the presences of at least one print medium being in the field-o... | 10/15/2002 |
| 6261013 | Door mounted roll support A portable printer comprising a door pivotally coupled to a main body of the portable printer at a back end, a printing medium roller support rotatably mounted on the door of the portable printer, a platen rotatably positioned at a front end of the door, ... | 07/17/2001 |
| 6176630 | Universal sensor index apparatus A universal index sensing apparatus. The index sensing apparatus can mount within the media cavities of different printers and can easily adjust for different brands and sizes of media moving therethrough.... | 01/23/2001 |
| 6155731 | Printing apparatus with cover actuated drive source A printer in which loading of print media is greatly facilitated and in which modular construction is used in order to substantially reduce the number of parts normally needed for this type of printer. The printer includes a base and an associated cover t... | 12/05/2000 |
| 6086274 | Line printer for the digital output and colorimetric measurement of colored images The present invention is concerned with a line printer for the digital output and calorimetric measuring of colored images, comprising a housing, a paper feeder, a paper discharge means, a printer carriage movable in a direction transverse to the paper fe... | 07/11/2000 |
| 6079892 | Method for detecting an end portion of a recording medium in a recording apparatus and end portion detection apparatus A sheet end detector comprising a light-emitting element and a light-receiving element for detecting changes in the amount of light associated with movement of a piece of a recording medium is provided. A standard value calculator detects the difference b... | 06/27/2000 |
| 6074114 | Color printer for repetitively printing a document The present invention discloses a color printer and its printing method for accurately printing different colors on a document. The printer comprises two roller wheels for clamping and carrying the document forward and backward, a stepping motor for drivi... | 06/13/2000 |
| 6047961 | Sheet sensor for use with a drum A sheet sensor arrangement for a sheet printing machine and particularly for a turning device of a sheet printing machine, which comprises at least one hollow cylindrical drum (3; 4), which has a gripper system to transport and/or temporarily store indivi... | 04/11/2000 |
| 6039481 | Paper width detecting apparatus and method for ink-jet printer A paper width detecting apparatus and method for an inkjet printer includes a right paper support integrally formed with a right home position detecting rib; a paper feeding portion for receiving paper sheets and supplying them for printing with the left ... | 03/21/2000 |
| 5944431 | Sheet sensor device with light curtain A sheet sensor device for a sheet-fed printing press having a sheet-reversing arrangement, said sheet-reversing arrangement being comprised essentially of a storage drum, a reversing drum and gripper systems mounted on these drums, so that a sheet sensor ... | 08/31/1999 |
| 5823692 | Optical registration system for label printer cutter attachment A detector assembly for detecting registration marks on a printed sheet when different color printing on different colored sheets is present has a pair of light sources and a light sensor. The light sources are of different colors selected to be complimen... | 10/20/1998 |
| 5697717 | Method and apparatus for controlling supply of electric power to an indicator for indicating a state of the apparatus A printer has an electric power supply controller which controls electric power supplied to an indicator indicating a state of the printer so as to prolong a driving time of the printer, which is driven by a battery. When the apparatus is set to an on-lin... | 12/16/1997 |
| 5486061 | Paper feeding method and apparatus for preventing the double feeding of papers In a paper feeding method and an apparatus therefor, papers are selectively fed to a paper-processing station through at least two paper guide paths. The respective papers fed through the paper guide paths are monitored to determine whether or not a doubl... | 01/23/1996 |
| 5348407 | Snap-on control panel A portable ink-jet printer and sheet feeder which can be battery powered. The printer may be manually fed paper for operation independent of the sheet feeder. The printer and sheet feeder are mounted on a base and locked at 90 degrees to one another. They... | 09/20/1994 |
| 5316395 | Printing apparatus having head GAP adjusting device. A printing apparatus includes a printing head for printing on a bank book, a platen disposed opposite the printing head, and a cam mechanism for moving the platen. A sensor detects the thickness of the bank book which is between the printing head and the ... | 05/31/1994 |
| 5266967 | Edge reading donor sensors for a thermal printer A thermal printer is provided with edge reading donor sensors that detect the presence of different color patches on the donor as the donor advances. The sensors detect the intrusion of a new color patch during the print cycle to stop the donor advance an... | 11/30/1993 |
| 5230573 | Printer with upstream sensor used to determine paper empty condition A printer improved in the accuracy of detection as to whether or not recording paper exists. The printer has a sensor provided upstream a printing head in a paper feed direction to detect whether or not recording paper exists, a device for measuring a pap... | 07/27/1993 |
| 5218353 | Display device for a recording device capable of displaying a plurality of operating states or conditions in effect In a display device for a recording device, when the power supply of the recording device is switched on, a display lamp is lighted to display that power-on. When the recording device is operated, and recording information is input, a misoperation detecti... | 06/08/1993 |
| 5152625 | Dual use of ribbon sensor in a printing device A recording device in which an ink ribbon is used and recording is performed shifting the ribbon in the direction of the width of the ribbon and having a sensor for detecting the end of an effective portion of the ribbon. Using the end sensor, the vertica... | 10/06/1992 |
| 5145271 | Serial printer A serial printer includes: a carrier mounted with a printing head; a display means movable with the carrier; a stationary panel having indicating windows arranged so that the display means is recognizable through the specific indicating window when the ca... | 09/08/1992 |
| 5092695 | Printer having ribbon wear indicator A dot matrix line printer is disclosed in which the amount of wear of an ink ribbon is measured by continuously compiling data representing impacting action of the printer as the printer prints. In one embodiment, this is accomplished by initially determining ... | 03/03/1992 |
| 5082384 | Paper detecting apparatus for printer A paper detecting apparatus for a printer which can be produced at a low cost. The paper detecting apparatus comprises a pivotal paper detecting member for detecting paper which passes a paper transport path, and a motion converting and transmitting mecha... | 01/21/1992 |
| 5078522 | Printer for bar-coded paper A printer having a function of reading a bar code attached on a printing paper. A carrier cover of a sensor carrier unit is disposed against the bar-coded surface of the printing paper as located in the printing position by a positioning means, and the pr... | 01/07/1992 |
| 4984913 | Printer having ribbon wear indicator A dot matrix line printer is disclosed in which the amount of wear of an ink ribbon is measured by continuously compiling data representing impacting action of the printer as the printer prints. In a first embodiment, this is accomplished by initially determin... | 01/15/1991 |
| 4934852 | Variable color display typewriter A typewriter with variable color display visually presents typed text in a color variable in accordance with the typing speed and accuracy.... | 06/19/1990 |
| 4881840 | Printer having paper-out and column zero detection mechanism A printer has a detection mechanism for detecting the absence of paper and the end position of the printhead upon start-up and reset. The detection mechanism includes a detection lever arm that is spring loaded and operationally positioned in a normal sta... | 11/21/1989 |
| 4867592 | Keystroke aligning system and margin indicator for typewriters and computer printers An optical method for alignment of paper when making corrections and additions to previously typed or printed sheets is described. A light spot is projected which indicates the exact point of type impact on the sheet. The paper can then be moved until the... | 09/19/1989 |
| 4836699 | Operator panel for printers An operator panel for printers which includes visible function indicators as well as trigger elements for controlling printer functions has a single function operating and indicating field arranged in a matrix fashion with lines and columns wherein the li... | 06/06/1989 |
| 4834563 | Thermal ink-transfer printer provided with jam detecting device A thermal ink-transfer printer is disclosed in which an ink donor sheet is wound on a supply reel. The ink donor sheet is drawn out from the supply reel and passes between a rotating drum and a thermal head and is then rolled round a winding reel. Printin... | 05/30/1989 |
| 4824269 | Variable color display typewriter A typewriter with variable color display visually presents typed text in a color variable in accordance with the typing speed and accuracy.... | 04/25/1989 |
| 4820069 | Sheet-feeding apparatus with selectable unit feed and coefficient therefor The present invention relates to a printing apparatus such as a typewriter which prints data from an inputting means on a printing medium. In the case of the normal printing apparatus, a feed amount setting means is installed which sets the amount of feed of l... | 04/11/1989 |
| 4818132 | Optical sensor protective member A protective member in the form of an opaque brush operates as a non-reflective shield to an optical sensor while protecting such sensor against ambient light. The brush also provides for removal of contamination from the surface of the optical sensor as ... | 04/04/1989 |
| 4778296 | Paper check device for a printer A paper check device for a printer including paper feed means, a light emitter, a light receiver, reflectance determination means, and paper check means. The paper check means determines that a paper is not on the platen when the platen is detected to be ... | 10/18/1988 |
| 4775253 | Printer with a movable carriage and a light source mounted off the carriage for positioning a type element mounted on the carriage Impact type printer of a construction having a carriage including a character type wheel, a light source disposed outside the carriage, device for introducing light beam from the light source into the carriage such as a flexible photoconductor, a mirror, ... | 10/04/1988 |
| 4772142 | Document processing system A document processing system has a pitch key for generating character pitch information, an MPU for counting the character pitch information to set auto mode data in an auto mode selection memory RAM, a wheel sort memory RAM for storing printing pitch inf... | 09/20/1988 |
