Typewriting machines – Sheet or web – Including friction-feed means
Patent
1992-12-30
1995-09-26
Bayerl, Raymond J.
Typewriting machines
Sheet or web
Including friction-feed means
395101, 400 61, 400 62, G06K 1500
Patent
active
054540658
ABSTRACT:
An electronic apparatus having a printer which can print at a speed according to a key operating speed of the user. A keyboard section KB includes: numeric keys for the user to input numeric data; function keys such as four-arithmetical operating keys such as addition "+", subtraction "-", multiplication ".times.", division ".div.". and total "="; and function keys such as clear key "C", memory key "M+", and the like which are set so as not to perform the printing, where the printing speed of the printer PR is variable. In an arithmetic computation unit AC, a period of time which is required after the numeric key of the keyboard KB was first operated until the function key accompanied with the printing operation is operated is divided by the number of key operation times, obtaining the average value of the key operation time intervals. The printing speed of the printer PR is controlled in accordance with the average operation time interval. The number of key codes stored in a key buffer memory is judged and a driving frequency of a stepping motor is controlled, allowing the printing operation to be executed at a variable printing speed.
REFERENCES:
patent: 3761880 (1973-09-01), Kritz et al.
patent: 3854124 (1974-12-01), Comstock et al.
patent: 3990559 (1976-11-01), Martin et al.
patent: 4763292 (1988-08-01), Kotani et al.
patent: 5077680 (1991-12-01), Sturm et al.
Bayerl Raymond J.
Canon Kabushiki Kaisha
Legree Tracy M.
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