Boots – shoes – and leggings
Patent
1978-03-03
1981-07-07
Shaw, Gareth D.
Boots, shoes, and leggings
G06F 312, G06F 313
Patent
active
042778352
ABSTRACT:
The apparatus can deal with graphs obtained as a computer output and comprises recording means controlled by a computing unit in response to the generation of each point of the graphs for recording in a memory an indication of its location in the graphs, addressing means for addressing said recording means so as to record the subsequent location indications being recorded adjacent and in the same order of the representation of the points made by said displaying or plotting means, and shifting means conditioned by said addressing means when the recording of a point is addressed for causing the shifting in said memory of the indications of all points following said recorded point in said order. The graph so recorded is plotted under the control of means which reads said memory in sequence. The memory is organized in cells, each one adapted to receive at least one of a group of points of a predetermined subarea of the plot. Each cell, when recording no points, is adapted to record a number indicating a plurality of blank subareas comprised between two subareas having at least one point recorded in the memory, whereby the blank subareas are recorded in compressed forms.
Partial images are recorded with compacted record of blanks and are transferred to a disk memory. In order to be plotted all the partial images are extracted in parallel and, upon decompacting, the blacks are compounded in a printing buffer so as to enable a point printing head to plot the entire image in a single scanning of the paper.
REFERENCES:
patent: 3165045 (1965-01-01), Troll
patent: 3471848 (1969-10-01), Manber
patent: 3833891 (1974-09-01), Howard et al.
patent: 3835456 (1974-09-01), Angelle et al.
patent: 3973245 (1976-08-01), Belser
patent: 4074254 (1978-02-01), Belser
patent: 4079458 (1978-03-01), Rider et al.
Ojalvo, M., "Data Compression Technique for the Elimination of Repeating Byte Strings", IBM TDB vol. 16, No. 8, Jan. 1974, pp. 2483-2486.
Garziera Gastone
Pisani Federico
Heckler Thomas M.
Ing. C. Olivetti & C. S.p.A.
Shaw Gareth D.
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