Patent
Incremental line printer
William Jerry Byrd
- 28 Jul 1975
12
TL;DR: In this article, an incremental impact printer of the dot matrix type is described, where the print head is always moved to the right of the last character printed to facilitate observation of that character.
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Abstract: An incremental impact printer of the dot matrix type. Binary words representative of data to be printed along a line of print may be accepted from either the printer keyboard or the output of a computer or other source. The printer electronics provides for either a single character or a burst of characters to be substantially instantaneously printed upon receipt. The print head is always moved to the right of the last character printed to facilitate observation of that character. The next character is printed by first moving the print head to the left of the last character printed and then abruptly reversing the print head to print one or a burst of characters "on the fly". A novel registration system serves the dual function of accurately locating the proper position for a character to be printed and determining the direction of movement of the print head at any given instant. The printer has a capability of receiving characters at a rate of 75,000 characters per second and of printing at a rate of up to 120 characters per second. The device can also be utilized in the transmission mode with the transmission rate through communication of other links being a function of the operator's typing speed. The printer is further capable of simultaneously accepting data while performing a printing operation.
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Citations
Patent
Printer subsystem with dual cooperating microprocessors
William Warren Boynton,Charles Joseph Weber +1 more
- 19 Oct 1979
TL;DR: In this article, a printer subsystem is interconnected with a host system from which it receives command and data information and to which it provides status information, and the printer subsystem has two microprocessors, one communicating with the host system for transfer of command, data, and status signals and the other controlling the printer unit in the subsystem especially with respect to the print assembly, forms feed assembly, ribbon drive assembly, and print wire actuators.
38
Patent
Method and apparatus for setting and varying margins and line spacing on data printers
William Wegryn,Juan F. Velazquez +1 more
- 25 Jul 1979
TL;DR: In this article, the authors describe a method and apparatus for setting and varying margins, line spacing and printing direction of a data printing machine by using a keyboard with push-button control which is coupled to a digital controller to input information about the actual and desired location of a print head relative to a printing surface.
32
Patent
Method and apparatus for generating a repetitive serial pattern using a recirculating shift register
William H. Shenk
- 25 May 1982
TL;DR: In this article, a method and apparatus for generating a repetitive serial pattern using a recirculating shift register was presented, which reduced the amount of memory that would otherwise be required to format the disk prior to its being available for normal write and read operations.
29
Patent
Dot matrix character printer control circuitry for variable pitch printing
Roy F. Lomicka,Peter N. Heller +1 more
- 23 Oct 1979
TL;DR: In this article, a dot matrix character printer with variable speeds and variable pitches is described, where the printing rate is limited by the cyclic rate of the print head, with an additional limitation based on dot printing density which prevents excessive heating of the printing solenoids.
23
Patent
Printer center sensing mechanism
Okun Kwan,Nicholas V. Zaccagnino +1 more
- 22 Sep 1977
TL;DR: In this paper, three fixed optical sensing devices are positioned to sense the left and right margins as well as the center location of high speed printer carriage travel to reduce the printing time of certain forms.
22
References
Patent
High speed printer
Robert Howard,Prentice I Robinson +1 more
- 14 Nov 1969
TL;DR: In this article, a high speed line printer has a number of sets of hammers; one hammer for each character position defining a line of print, which coact with a moving type band each hammer time shares one of the drive circuits with others of the hammers in a set.
30
Patent
Bidirectional dual head printer
Howard Duley
- 12 Nov 1973
TL;DR: In this article, a high-speed impact printer of the dot-matrix type employing at least first and second print head assemblies for printing characters or other symbols in line-by-line fashion upon a paper document is presented.
23
Patent
Control system for high speed printer
John R. Fulton,Walter J. Zenner +1 more
- 19 Mar 1971
TL;DR: In this article, an all-electronic control system for a high-speed dot matrix printer, using a permutation code input signal comprising individual code words each including a fixed number of data pulses preceded by a start pulse, is presented.
22
Patent
Text display control for data printer
George W. Volling,Peter G.S. Mero +1 more
- 12 Sep 1973
TL;DR: In this article, a text display system for a signal-actuated data printer is described, which includes detector apparatus for sensing the absence or presence of a code word in an output level of an input data store for the printer.
20
Patent
Special symbol generator for high speed printer
John R. Fulton,George W. Volling +1 more
- 17 May 1974
TL;DR: An all electronic control system for a high-speed dot-matrix printer as discussed by the authors enables the printer to print special symbols unsuited to the usual character format constituting a group of dot-position columns separated from the next character by a number of blank columns, using an input signal comprising a series of intermixed code words individually representative of standard data characters and special symbols.
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