US4771340A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for printing information
Assignee: Canon Production Printing Netherlands BV
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Filing: 1987-04-02
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Granted: 1988-09-13
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Expires: 2007-04-02
Abstract
Abstract Apparatus and method for printing information by a raster output scanner adapted to form an image on an image-forming medium which has fixed imaging sections, and thereafter transferring the image to a receiving sheet at a repetition frequency corresponding to one machine cycle time (T). The front-end processor of the apparatus is adapted to postpone a set-up-page signal one or more whole multiples of a machine cycle time (T) by means of a prediction algorithm stored in a memory on the basis of coded signals.
Inventors
- 👤 Ronald M. W. Notermans
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:14
CPC Classifications
G; G06; G06K; G06K15/00; G06K15/02; G06K15/12; G06K15/128; G06K2215/00; G06K2215/0082; Y; Y10; Y10S; Y10S347/00; Y10S347/90
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
168 words
A raster output scanner printing means having fixed imaging sections and means for transferring a formed image to a receiving sheet at a repetition frequency of one machine cycle time (T) said scanner, comprising a control means for forming a print in response to a set-up-page signal and a front-end system connected thereto, said front-end being adapted to provide a set-up-page signal and comprising a processor memory means, a raster-image processor and a page-size bit-map memory, said front-end system being adapted to receive coded information about a complex page and said raster-image processor for decoding said information and placing it in corresponding locations in said bit-map memory; said raster-output scanner including exposure means for exposing a fixed imaging section a fixed time after said set-up-page signal in response to signals originating from said bit-map memory, the improvement in combination therewith comprising means for postponing said set-up-page signal one or more multiples of said machine cycle time (T), said means including a prediction algorithm stored in said memory means.
Claim 2
Dependent Claim
168 words
A raster output scanner printing means having fixed imaging sections and means for transferring a formed image to a receiving sheet at a repetition frequency of one machine cycle time (T) said scanner, comprising a control means for forming a print in response to a set-up-page signal and a front-end system connected thereto, said front-end being adapted to provide a set-up-page signal and comprising a processor memory means, a raster-image processor and a page-size bit-map memory, said front-end system being adapted to receive coded information about a complex page and said raster-image processor for decoding said information and placing it in corresponding locations in said bit-map memory; said raster-output scanner including exposure means for exposing a fixed imaging section a fixed time after said set-up-page signal in response to signals originating from said bit-map memory, the improvement in combination therewith comprising means for postponing said set-up-page signal one or more multiples of said machine cycle time (T), said means including a prediction algorithm stored in said memory means.
Claim 3
Dependent Claim
131 words
In a method for use in the printing means claimed in claim 1, wherein said method comprising starting formation of a print on said set-up-page signal storing coded information about a complex page in said front-end system and expanding said coded information; storing said expanded information in said bit-map memory at corresponding locations, reading-out said bit-map memory a fixed time after said set-up-page signal is delivered and line by line exposing a fixed imaging section image-wise by means of said read-out information, the improvement comprising determining the decoding time requiring to fine-format said coded information and placing it in said bit-map memory and postponing said set-up-page signal, on the basis of this determined decoding time, for a time corresponding to one or more whole multiples of a machine cycle time (T).
Claim 4
Dependent Claim
20 words
A method as set forth in claim 2, wherein said determination includes a prediction algorithm based on said coded information.
Claim 5
Dependent Claim
42 words
A method of determining the decoding time according to claim 3, wherein the time required to fine-format said information is determined from the individual fine-format times of each character occurring on a complex page and summating all of said individual fine-format times.
Claim 6
Independent Claim
70 words
A method of determining the decoding time according to claims 2, 3 or 4, wherein the bit-map filling time is determined by determining the character time or average process time as the average time required to place a character of a given size in the bit-map memory, determining the number of characters of each size occurring on the page, and multiplying and summating these character times by the associated numbers.
References Cited (Backward Citations)
US4302096A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-09-13 | 1992-03-14 | 1992-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-13 | 1996-03-14 | 1996-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-13 | 2000-03-14 | 2000-09-13 | $7700.00 | Window Closed / Lapsed |