Famous Patents
3M employee and church chorister Art Fry needed something to temporarily mark pages in his hymnal. He was in luck because his colleague, Spencer Silver, accidentally developed a glue that was too weak for other purposes. After initially discouraging consumer response, Post-it Notes became a hit in 1979.
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| Number | Title | Issue Date |
| 4737802 | Fluid jet printing device The present invention relates to a fluid jet printing device A to U having an inlet 14, an outlet nozzle 13 and a valve 3, 5 located between the inlet and the outlet. The valve comprises a movable actuation member 3 cooperating with a valve seat. For enha... | 04/12/1988 |
| 4723131 | Printhead for ink jet printing apparatus A printhead for an ink jet printing apparatus comprising a body having a recess in its back face, and a plurality of bosses extending from the bottom of the recess with an orifice extending through each boss; a flexible membrane over the recess forming a ... | 02/02/1988 |
| 4679059 | High speed ink jet printer with improved electrical connection to the nozzles An ink jet printer is provided with an ink reservoir including a laminar substrate covered on the outer surface of a plurality of metal coatings forming individual electrodes associated with a plurality of nozzles. These latter are formed of holes passing... | 07/07/1987 |
| 4633267 | Arrangement for the ejection of individual droplets from discharge openings of an ink printer head In an arrangement for the ejection of individual droplets in an ink printer head, the drive elements fashioned as conductor loops are formed by U-shaped middle parts in the region of the ink channel the conductor loops lie in the field of a magnet system;... | 12/30/1986 |
| 4631553 | Printer head of an ink-jet printer An improved printer head for use in a non-impact type printer such as an ink-jet printer is provided. The printer head includes a first flow passage extending from an inlet port, to which ink under pressure is supplied, to a draining port and a second flo... | 12/23/1986 |
| 4628330 | Ink-jet recording apparatus An ink-jet recording apparatus applies a pressure, which is higher than atmospheric pressure, to an ink supply. A recording head includes a nozzle for jetting ink droplets. A valve is disposed between the pressurized ink supply and the nozzle in order to ... | 12/09/1986 |
| 4607267 | Optical ink jet head for ink jet printer An optical ink jet head for an ink jet printer irradiates a photochemically reactive substance by an active electromagnetic wave to generate gas so that ink is ejected by the pressure of the gas. In optical communications, optical signals transmitted by o... | 08/19/1986 |
| 4591883 | Ink-jet printer head A printer head for use in an on-demand type ink-jet printer includes a main body which is provided with a nozzle opening, through which ink is ejected to form flying ink droplets, and an ink passage extending to the nozzle opening for storing ink therein ... | 05/27/1986 |
| 4576111 | Marking jet discharging head A discharging head assembly for marking apparatus has a chamber for marking fluid with a plurality of fluid dispensing orifices which are closeable and openable by displaceable closure elements connected via flexible pulling means to respective actuators ... | 03/18/1986 |
| 4564846 | Drop on demand dot matrix printing head A drop-on-demand printer system has a print head including a manifold plate and one nozzle plate for each desired printing nozzle array. The manifold plate carries dot valves each controlling the flow of ink to one nozzle of each array. Ink passed by each... | 01/14/1986 |
| 4555719 | Ink valve for marking systems A fast acting ink valve adapted to be used in conjunction with the nozzle of an ink jet printing system is disclosed. A flexible diaphragm modulates flow through a valve chamber. A spring biases the diaphragm to a sealed position to prevent flow. Ink pres... | 11/26/1985 |
| 4546361 | Ink jet printing method and device A droplet of ink 11 is expelled from a nozzle in a wall, so as to strike a printing medium, by suddenly moving the wall towards the ink 11 with which it is in contact. This movement is effected by energizing a piezoelectric sleeve. The ink droplet is expe... | 10/08/1985 |
| 4542386 | Ink jet printing system An ink jet printing system including a lower cabinet in which is supported ink and solvent supplies, an upper cabinet in which is supported a microprocessor based controller and a remote ink jet printing head connected with the lower cabinet through a fle... | 09/17/1985 |
| 4539570 | Stackable fluid dispensing apparatus A stackable fluid dispensing apparatus has a case and a fluid manifold located within the case which is adapted to be connected to a source of pressurized fluid. A plurality of valves located within the case are connected to the fluid manifold by a plural... | 09/03/1985 |
| 4520375 | Fluid jet ejector A fluid jet ejector, such as is used in an inkjet printer head, is provided by a pair of spaced capacitor plates, one of which is a thin diaphragm, preferably of semiconductor material, such as silicon. The capacitor plates may be photolithographically de... | 05/28/1985 |
| 4517577 | Method of and apparatus for priming an ink jet A demand ink jet is primed by flowing ink toward the inlet to the chamber of the jet. Ink which does not enter the inlet to the chamber is permitted to flow past the inlet toward a vent. When priming is completed, the vent is closed.... | 05/14/1985 |
| 4480259 | Ink jet printer with bubble driven flexible membrane An apparatus is disclosed for propelling ink droplets from an ink jet nozzle which uses an expanding bubble as a driving mechanism. Unlike other thermal ink jet devices, the ink itself is not used to provide the driving bubble. Rather a two fluid system i... | 10/30/1984 |
| 4468679 | On-demand type ink-jet printer An ink-jet printer for recording information by jetting ink droplets on a recording medium has a plurality of ink-jet nozzles arranged so that ink droplets projected therefrom combine in flight at a space between the nozzles and the recording medium. The ... | 08/28/1984 |
| 4460905 | Control valve for ink jet nozzles The valve mechanism controls the flow of ink from a pressurized ink supply to a plurality of ink nozzles for printing bar codes. The mechanism includes a valve ball and a valve seat and an elastic diaphragm is positioned opposite the valve seat and is mov... | 07/17/1984 |
| 4415910 | Ink jet transducer An ink jet transducer operates on pressurized ink which is released on demand by action of an electromagnet operating to unseat a magnetic ball seated on the nozzle. Ink droplets are formed and are caused to travel in a path along the nozzle axis to impac... | 11/15/1983 |
| 4406405 | Device for the ejection of droplets as required A device for the production of ink droplets as required includes a nozzle fed with liquid through a pipe connected to a tank and associated with a pressure transducer which produce pulsations in the liquid. The pressure transducer exhibits an internal cav... | 09/27/1983 |
| 4380018 | Ink droplet projecting device and an ink jet printer An on-demand type ink jet printer, and an ink droplet projecting device used in this printer are disclosed. This device operates in the following way: a piezo-electric element transmits the pressure generated by its vibration first to the pressure transmi... | 04/12/1983 |
| 4378564 | Ink jet printing apparatus and process An ink jet printing apparatus is shown which has a source of pressurized ink connected to a plurality of solenoid valves. Each valve has an input port in fluid communication with the pressurized ink source and an output port. A plurality of jeweled orific... | 03/29/1983 |
| 4366487 | Jet printing apparatus and method A jet printing apparatus is shown having a reservoir for storing printing medium. A perforate member having at least one surface which is exposed to the printing medium in the reservoir with the ink entering the perforations. A drive motor effects relativ... | 12/28/1982 |
| 4336544 | Method and apparatus for drop-on-demand ink jet printing A drop-on demand ink jet printer and a method of ink jet printing are disclosed which produce drops whose diameter have a ratio to the internal diameter of their print nozzles of 1:2 instead of the standard ratio of 2:1. This change in the basic ratio of ... | 06/22/1982 |
| 4233610 | Hydrodynamically damped pressure pulse droplet ejector An energy dissipative element is used in a pressure pulse drop ejector. The element is designed to efficiently eliminate unwanted meniscus vibration. In one embodiment, one or more relatively thin screens are placed in the liquid flow path to simultaneous... | 11/11/1980 |
| 4215350 | Ink jet printing apparatus with two different jet spacings Apparatus for applying characters to packages or other objects advanced through a marking station. The characters, which each consist of a pattern of points or spots, are applied by the discharge of ink onto the object from a plurality of nozzles arranged... | 07/29/1980 |
| 4162502 | Printer with electrostatic ink control A liquid ink printer uses electrostatic control of ink flow along paths defined by strips of hydrophilic material. The strips may be discontinuous, with a narrow gap across which ink is urged to flow by application of a voltage to an electrode, or a gate ... | 07/24/1979 |
| 4155229 | Printing apparatus A plurality of sleeves extends through a printing-medium chamber; each sleeve has one or more openings through which its interior can communicate with the chamber. In each sleeve a plunger is reciprocable between a retracted position in which the opening ... | 05/22/1979 |
| 4146900 | Printing system A printing system is disclosed wherein ink is emitted from a nozzle as entrained in a jet of air. The ink is introduced onto an ink wall from an ink passageway and a fluid passageway has an outlet directing air at an angle onto this ink wall to cause ink ... | 03/27/1979 |
| 4032929 | High density linear array ink jet assembly A high density linear array ink jet assembly is provided wherein a multiple chamber unit comprises a chamber housing and at least one flexible diaphragm spanning and sealing the chambers from each other and forming one wall of each chamber. A plurality of... | 06/28/1977 |
| 4023180 | Dot printer with electrically propelled ink A print head for a column-sequential or row-sequential dot matrix printer which prints dots by electrically propelling droplets of ink onto a record comprising a manifold having an ink chamber communicating with a plurality of closely spaced generally par... | 05/10/1977 |
| 4021818 | Liquid printing device A printing device for printing with drops of printing fluid, in which discrete droplets of a printing fluid are ejected from a printing element along a predetermined path to a recording surface. The printing element comprises a nozzle communicating with a... | 05/03/1977 |
| 4014693 | Electroviscous recording A method for forming a colored liquid deposit in image configuration on a surface including means for periodically varying the distance between the surface and the liquid to provide breaks in contact between said surface and said liquid.... | 03/29/1977 |
| 4002230 | Print head apparatus A new and improved print head apparatus for applying ink in a selectively controlled matrix of dots to form letters, numbers, characters and symbols onto packages, containers and the like, which is compact in size and adapted for rapid, accurate movement ... | 01/11/1977 |
| 3995282 | Device for selectively transferring spots of liquid ink A device for selectively depositing spots of a liquid ink electrode is provided for forming an electric field which acts on the meniscus of the liquid on a liquid-conduit as a deformation pulse is disposed behind the record carrier and the liquid-conduit ... | 11/30/1976 |
| 3943527 | Noncontacting marker A noncontacting marking apparatus for ejecting, upon receipt of a control signal, a drop of marking liquid for marking purposes. The amount of marking liquid is controllable. A tube couples the ejection point of the marker to a source of vacuum for removi... | 03/09/1976 |
