Did You Know...
...that while attempting to develop a super strong glue, 3M employee Spencer Silver accidentally developed a glue that was so weak it would barely hold two pieces of paper together? However, his colleague Art Fry needed the glue. Fry sang with his church choir and marked the pages of his hymnal with small scraps of paper that often fell out. He used Silver's glue to hold the papers in place. Today we call this invention Post-it Notes.
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| Number | Title | Issue Date |
| 5810489 | Printing type printer The present invention is intended to facilitate the replacement of printing types and to eliminate mistakes in the replacement thereof. A printing type wheel 2 and a stock wheel 3 are coaxially arranged. The printing type wheel 2 is provided with an attac... | 09/22/1998 |
| 5113759 | Latch mechanism for small-size printer A latch mechanism for a small-size printer capable of performing a printing operation with a desired type on a rotatable type drum being held at a print position by impacting a hammer towards the type drum across a recording paper loaded therebetween. The... | 05/19/1992 |
| 5104248 | Print wheel shift mechanism for use with a miniature printer In a miniature printer including a carriage for motion along a path in linear reciprocating directions having at least one cam surface, a frame including a projection adjacent to the path and a print wheel having at least two levels of print type, a mecha... | 04/14/1992 |
| 4856922 | Two-color printer The printer is mounted on a desk-top computer and can print both numeric characters and graphic and calculation symbols in two different colors. The characters and the symbols are provided in a relief configuration in accordance with a matrix of rows and ... | 08/15/1989 |
| 4683819 | Compact printer with hammer structure within type drum A compact printer having a cylindrical support member and a type carrier member externally affixed to the support member. A type printing assembly is disposed within the type drum for causing characters on the type carrier member to print. A motor for rot... | 08/04/1987 |
| 4609295 | Hand-held printing calculator A hand-held printing calculator for printing calculating results on elongated paper strips from a bundle of paper strips disposed within the calculator is provided. The calculator includes a microprinter having a paper feeding assembly including feeding e... | 09/02/1986 |
| 4542998 | Character set printing means utilizing rolling pressure contact for printing A printing apparatus is provided which utilizes rolling pressure contact for printing, and includes a plurality of sets of serially arranged character elements mounted for movement on the external surface of a printing drum. Movement of the sets to place ... | 09/24/1985 |
| 4480935 | Printing type drum There is disclosed an integrated cylindrical formation of plural lines of a printing type belt in such a printing type drum as contains a hammer unit therein, has plural lines of printing type belts installed round the periphery of the cylindrically forme... | 11/06/1984 |
| 4416557 | Serial printer A serial printer for use in portable electronic calculators and the like. The printer includes a single printing head having a plurality of characters divided into two groups circumferentially disposed therearound in a predetermined pattern. A selecting m... | 11/22/1983 |
| 4138942 | Printing device for printing on a continuously moving form The present device is a means for printing multi-lines of characters simultaneously on a continuously moving print receiving medium or form and in a manner eliminating the need for indexing the form line by line and column by column. Multiple type fonts a... | 02/13/1979 |
| 4089263 | Impact printer An impact printer in which a printing drum having a plurality of lines each containing different characters is associated with printing hammers. The printing hammers are driven into contact with the characters by a driving shaft having a driving projectio... | 05/16/1978 |
| 4084503 | Printer apparatus High speed, on-the-fly line printer apparatus including an inked ribbon advancing mechanism, a print sheet advancing mechanism, and drive structure coupled with both the advancing mechanisms to interruptedly advance them. Also, the inked ribbon advancing ... | 04/18/1978 |
| 4083299 | Electromagnetic striking members selectively actuated in time from alternating current power There is disclosed an impact device for operation from a source of alternating power and with at least striking member adapted to be electromagnetically actuated to impact against an opposing surface. An electrical gate under the control of a switching ci... | 04/11/1978 |
| 4039067 | Character printing device A printing device employs a printing drum on the peripheral wall of which a plurality of character type are arranged in the axial direction and in the circumferential direction. The axial movement and rotation of the drum are independently controlled by c... | 08/02/1977 |
| 4027764 | Apparatus for confirming the correct impression of printing characters An apparatus for confirming the correct impression of printing characters wherein any of the characters arranged in at least one line circumferentially extending on the peripheral surface of a cylindrical printing drum is designated by controlling the ope... | 06/07/1977 |
| 4011811 | Multiple document printing system A printing system with one drive motor and having at least two printing stations located between a print drum and a plurality of ballistic elements for simultaneously printing at least two document blanks independently advanced through the printing statio... | 03/15/1977 |
| 3987886 | Mechanism for varying the gap between the print hammers and the type font faces of a printer The present arrangement provides a housing means in and upon which are mounted at least the paper advance tractor assemblies including the drive means therefor and the print hammers of the printer. In addition the housing means is formed to have an eccent... | 10/26/1976 |
| 3977320 | Electrically controlled postage meter An electromechanical setting mechanism is disclosed, which uses a plurality of solenoid banks to set each print wheel of a postage printing drum. Each bank features two pairs of solenoids which are mounted upon a movable frame. One pair of the two pairs o... | 08/31/1976 |
| 3964592 | Printing mechanism for printing characters A printing mechanism for printing characters comprises a rotatable hammer confronting through a recording paper the surface of a character pattern bearing body having a plurality of character patterns embossed in a predetermined array on its surface; a st... | 06/22/1976 |
| 3933235 | Type indicator A type character visual indicator for an interlingual typewriter for multiple languages typing and having a chassis provided with a window, a drum having type characters is mounted for rotating and sliding to a position to align a selected type character ... | 01/20/1976 |
