Tab adjust function for an electronic typewriter to permit the shifting of tabs from a first to a second format
US4957380A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 14, 1988 |
| Grant date | Sep 18, 1990 |
| Priority date | — |
| Expiry date | Mar 14, 2008 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06F40/151
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A typewriter may store a document in a first format with margins and tab stop locations defined for a first format and then the operator may change the margin or tabs to a second format. The operator may also select whether the tab stop locations may be played out with the same relative positioning to the left margin or be played out using the newly set tabs and margin setting. The newly set tab stop locations are defined as a fixed position relative to the print line and are independent of the left margin position or the position of the original tab stop location relative to the left margin. The memory of the typewriter may be optionally updated when the document is played out using the second format tab stop locations, if the operator conditions the storage to accept changes during playout. Alternatively, the document may be played out using the second format tab stop locations, and the original format tab stop locations are maintained for future use.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.