Did You Know...
...that the x-ray was discovered purely by accident? When German physicist Wilhelm Konrad von Roentgen was experimenting with cathode rays in 1895, he put an activated Crookes tube in a book and went out to lunch. When he returned, he discovered that a key that had also been placed in the book showed up as an image on the developed film!
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| Number | Title | Issue Date |
| 6830393 | Printing method, printing device and time recorder A printing method for a dot impact type printer including a printer head with a plurality of printing pins arrayed; a moving mechanism for the printer head, and a control unit for controlling printing operation of the printing pins and the moving mechanism of the pr... | 12/14/2004 |
| 6789965 | Dot printer with off-axis loading A pin-in-capillary apparatus for depositing droplets of fluid onto a surface is described. The apparatus has an off-axis channel for supplying fluid to the capillary. In the capillary the fluid wets the tip of the pin and is delivered to the surface when the pin is ... | 09/14/2004 |
| 5975776 | Dot matrix print head with unitary armature assembly and method of operation thereof A print head is disclosed which includes a unitary armature assembly including a thin resilient spring, thick structural members and cores upon which a magnetic flux path can be electrically imposed, such that motion of the armatures is constrained to onl... | 11/02/1999 |
| 5865544 | Dot-matrix print head, in particular for magnetic ink printers A dot-matrix print head comprising a pin guide body including: a first array of pin guide holes having respective centers aligned on a first longitudinal straight line and spaced from one another longitudinally by a constant distance equal to one pitch; and a ... | 02/02/1999 |
| 5787803 | Dot line printer with mimimum hammer gap arrangement In a dot line printer including a cylindrical platen for supporting a print paper and a hammer bank supporting a plurality of print hammers, the hammer bank is a double bank structure in which a first half of the print hammers are attached to the upper ba... | 08/04/1998 |
| 5674015 | Arrangement of actuators and tip ends in a wire dot print head Plural guide holes are arranged in a matrix form in a wire guide. Plural print drivers are circularly arranged in plural layers for first print drivers belonging to a layer near to the wire guide and for second print drivers belonging to a layer far from ... | 10/07/1997 |
| 5642948 | Biaxial printer for portrait and landscape printing A printer employs a print head having a wire column arranged at an angle between 0° and 90° relative to a permitted line of motion of the print head. This angled print head allows for both portrait and landscape printing. Portrait mode printing is perfo... | 07/01/1997 |
| 5586496 | Dot line printer with adjusted dot positions for canceling sheet feed error In a dot line printer that prints, for example, eight lines of dots with each single scan of a hammer bank, wherein the pins of hammers for printing the first dot line and the eighth dot line or for printing the second dot line and the seventh dot line ar... | 12/24/1996 |
| 5533817 | Biaxial printer A printer employs a print head having a wire column arranged at an angle between 0° and 90° relative to a permitted line of motion of the print head. This angled print head allows for both portrait and landscape printing. Portrait mode printing is perfo... | 07/09/1996 |
| 5482387 | Dot print head and method of control over printing therewith In a dot print head of an impact type moved in a direction of spacing movement relative to a printing medium, and having a plurality of printing elements each having a printing wire arranged substantially in an elongated circle centered at a line parallel... | 01/09/1996 |
| 5374943 | Method for activating and for driving printing elements A method for driving printing elements of a dot matrix printer provides that the matrix dots to be printed are to be thinned out without any thin lines, in particular steeply inclined thin lines, being lost. To this end, the columns of the matrix are cons... | 12/20/1994 |
| 5310270 | Printing method for dot impact type serial printer A dot impact type serial printer is provided with a print head which has a plurality of print wires for printing an image. The print wires required to print a particular image are thrust toward a platen successively upon receiving a print timing signal, w... | 05/10/1994 |
| 5190382 | Print element arrangement in serial matrix printer A serial printer having a dot type printing head for printing on a paper. The printer includes 2N columns of dot forming elements where N is a positive integer equal to 2 or more and a carriage supported on the printer for reciprocal movement across the p... | 03/02/1993 |
| 5133613 | Printing head using staggered arrangement needles A printing head includes solenoids arranged in an annular array for driving needles which are arranged in a zigzag array of two vertical columns. Solenoids corresponding to needles forming one of the columns are arranged on a semicircle of the annular arr... | 07/28/1992 |
| 5048984 | Matrix printer In matrix printers, the printing elements in the printing head are frequently arranged so that they do not correspond to the printing raster of the characters to be printed so that the informations delivered for each time a printing column at the same tim... | 09/17/1991 |
| 4279521 | Wire matrix print head A wire matrix print head has a first group of wires activated by a first group of electromagnetic means disposed on the circumference of a circle and substantially equally angularly spaced from each other. A second group of print wires is activated by a s... | 07/21/1981 |
| 4255062 | Matrix print head A print head for matrix printing has twelve needles whose front ends are arranged in three columns and seven rows, whereby the middle one holds only two needle ends in the second and sixth row, while the other row positions each of the two outer columns h... | 03/10/1981 |
| 4079824 | Double speed dot matrix printhead A dot matrix printer including a single printhead having two columns of print wires, the wires in one column being used to print only odd numbered dot columns on a record member and the wires in the other column being used to print only even numbered dot ... | 03/21/1978 |
