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1. 发明专利

JPH10315583A PRINTER CONTROLLER 失效
公开(公告)号：JPH10315583A
公开(公告)日：1998-12-02
申请号：JP14343297
申请日：1997-05-16
申请人： RICOH KK
发明人： KAWAKAMI HIROSHIGE
IPC分类号： B41J29/38 , B41J5/30 , G06F3/12 , H04N1/413
摘要： PROBLEM TO BE SOLVED: To speed up a print output by speeding up a coding processing. SOLUTION: Image data 31 are divided into a plurality of bands Band 1-n and, on the occasion when bit map data 34-1-n of the individual bands are coded respectively by a plurality of coders 20-1-n, a plurality of reference candidate pixels are set for every line in the main scanning direction. A function of incrementing a value of a counter corresponding to the reference candidate pixel conforming to a noted pixel, a function of comparing values of individual counters with one another, a function of switching the reference candidate pixel to which the counter showing the largest value corresponds over to the reference candidate pixel in the subsequent processing for one line in the main scanning direction, every time when the processing of the bit map data for one line in the main scanning direction is finished, and a function of avoiding reference to the reference candidate pixels to which the counters showing small values, in the subsequent processing for one line in the main scanning direction, are provided. Besides, a function of not incrementing the counters corresponding to the reference candidate pixels to which the counters showing the small values correspond, in the subsequent processing for one line in the main scanning direction, is also provided.

2. 发明专利

JPH10202961A PRINTER CONTROLLER 失效
公开(公告)号：JPH10202961A
公开(公告)日：1998-08-04
申请号：JP1260197
申请日：1997-01-27
申请人： RICOH KK
发明人： KAWAKAMI HIROSHIGE
IPC分类号： B41J5/30 , G06F3/12
摘要： PROBLEM TO BE SOLVED: To improve the data compressibility with an encoding means (or an encoder) without increasing a memory in a printer controller. SOLUTION: When an encoder encodes bit map data in band unit, a plurality of reference candidate pixel counters 520 -5211 respectively compare an attended pixel 31 with corresponding reference candidate pixels 510 -5111 on the same time as a main scanning direction so as to increment a count value by +1 when both the pixels coincide with each other so as to compare the count values of the respective reference candidate pixel counters 520 -5211 at every finish of the processing of the bit map data by one main scanning or one band in order to select the reference candidate pixel counter, the count value of which is maximum, with a selector (SEL Reg) 55 and select the reference candidate pixel corresponding to the selected reference candidate pixel counter with a selector(SEL) 53 as the data processing reference pixel for the next line or band.

3. 发明专利

JPH0993425A IMAGE FORMING DEVICE 失效
公开(公告)号：JPH0993425A
公开(公告)日：1997-04-04
申请号：JP24616995
申请日：1995-09-25
申请人： RICOH KK
发明人： KAWAKAMI HIROSHIGE
IPC分类号： H04N1/21 , H04N1/387 , H04N1/411
摘要： PROBLEM TO BE SOLVED: To reduce the memory capacity of a frame memory. SOLUTION: Document data to be printed are rasterized by 1st resolution (600DPI) used usually by a PS interpreter 21, a compression section 22 applies variable length reversible compression processing to the data, and the resulting compression code is stored in a compression memory (frame memory) 23. In this case, when the compression code exceeds a prescribed size, the PS interpreter 21 is used to release a compression memory and rastilizes again the data with 2nd resolution (300DPI) smaller than the 1st resolution, the compression section 22 applies variable length reversible compression processing to the data and the resulting compression code is stored in the compression memory. Then the compression code stored in the compression memory is expanded with the 1st resolution by an expansion section 25 and a binary multi-value conversion processing section 26 and the result is fed to a printer engine 208 with the 1st resolution.

4. 发明专利

JPH07175614A PRINTER SYSTEM DEVICE 失效
公开(公告)号：JPH07175614A
公开(公告)日：1995-07-14
申请号：JP26038594
申请日：1994-10-25
申请人： RICOH KK
发明人： KAWAKAMI HIROSHIGE
IPC分类号： B41J2/525 , B41J5/44 , G06F3/12
摘要： PURPOSE:To improve the efficiency of the total network environment of a printer system. CONSTITUTION:A CPU 10 acquires present emulation information by reading an emulation discrimination parameter previously stored in a RAM 15. When a print job file is the same as a file set to a printer, that print job file is preferentially printed. Thus, since printing efficiency is improved by applying the priority to the print job files, the efficiency of the total network environment is improved.

5. 发明专利

JPH0564938A PRINTER 失效
公开(公告)号：JPH0564938A
公开(公告)日：1993-03-19
申请号：JP22900491
申请日：1991-09-09
申请人： RICOH KK
发明人： SUGIYAMA MITSUGI , KAWAKAMI HIROSHIGE
IPC分类号： B41J21/00 , G06F3/12
摘要： PURPOSE:To achieve improvement of efficiency of operation by a method wherein setting and correction of a layout are made easy or a printer which can set and correct the layout even on the printer side is provided. CONSTITUTION:For a panel device 13, horizontal and vertical positional counters are provided to a switch engine I/F 6 which indicates setting or correction of a left margin and a top margin on paper. A CPU 1 calculates counting values of the left margin and the top margin on each corresponding photosensible material according to the set value or the corrected value of the margin indicated with the switch of the panel device 13, and outputs them to the horizontal and vertical positional counters. The horizontal and vertical positional counters count respectively image clock and line signals. When they conform to the counted values inputted from the CPU 1, a printing start signal is outputted, and printing is started.

6. 发明专利

JPH1023272A DATA COMPRESSION METHOD AND EXPANSION METHOD IN PAGE PRINTER 失效
公开(公告)号：JPH1023272A
公开(公告)日：1998-01-23
申请号：JP17258796
申请日：1996-07-02
申请人： RICOH KK
发明人： KAWAKAMI HIROSHIGE
IPC分类号： B41J5/30 , G06F3/12 , G06F5/00 , H03M7/42 , H04N1/415
摘要： PROBLEM TO BE SOLVED: To attain high-speed compression and expansion processing of image data by generating a coded lookup table in which image data are compressed and stored, so as to realize reduction in a memory capacity, low cost and high resolution. SOLUTION: Record data, compressed to the utmost through the combination of image data with a prescribed bit number being a reference length to reference a coded lookup table (d), are stored in advance in the coded lookup table (d). Then for the data of a prescribed bit number from a head, with respect to image data in the unit of blocks, the coded lookup table (d) is referenced, based on the combination of white dots and black dots. Then the record data stored therein are stored in a coded code (CDR) storage area, as part of the compression code, and the coded lookup table (d) is again referenced from the start of the remaining image data which could not be compressed.

7. 发明专利

JPH09270919A DATA COMPRESSION METHOD IN PAGE PRINTER 失效
公开(公告)号：JPH09270919A
公开(公告)日：1997-10-14
申请号：JP10403096
申请日：1996-03-31
申请人： RICOH KK
发明人： KAWAKAMI HIROSHIGE
IPC分类号： B41J5/30 , H04N1/21 , H04N1/41 , H04N1/413
摘要： PROBLEM TO BE SOLVED: To remarkably reduce a memory capacity of the page printer, so that rasterized print data, including an image, are compressed at a high compression rate. SOLUTION: Variable length reverse compression processing is applied to rasterized data in the unit of prescribed blocks, compression data are stored in a compression memory and when compression is disable, the data of the block are stored in a non-compression memory without compressing the data. When either of run length compression system and a difference compression system is used to compress the data and the compression is disable, the other system is used to compress the data and when the data are compressed by any system, the compression data are stored in the compression memory, while setting a flag indicating the adopted compression system.

8. 发明专利

JPH08307696A DATA COMPRESSION EXPANSION METHOD IN PAGE PRINTER 失效
公开(公告)号：JPH08307696A
公开(公告)日：1996-11-22
申请号：JP2168996
申请日：1996-01-13
申请人： RICOH KK
发明人： KAWAKAMI HIROSHIGE , HANIYU YOSHIAKI , SHITAMAE MUTSUO
IPC分类号： B41J5/30 , H04M1/21 , H04N1/41
摘要： PURPOSE: To improve the performance by reducing a memory capacity of a page printer and reducing considerably number of times of access to a memory bus in the case of expanding compression data so as to enhance the processing efficiency. CONSTITUTION: Variable length reversible compression processing is applied to rasterized image data in a prescribed unit and when data of one unit are all white level data, compression codes including a specific code are stored in a compression memory area of a RAM 206. After the storage of compression codes of data by one page is finished, when the data are expanded by an expansion section 25, the presence of the specific code is discriminated in the unit and when the presence of the specific code is discriminated, a flag is set to a NULL table 30 and read and expansion are not applied to the compression codes of the unit and fully white level video signals directly from a video output section 27 are outputted to a printer engine 208.

9. 发明专利

JPH0588931A TERMINAL EQUIPMENT WITH SELF-DIAGNOSITIC MEANS 失效
公开(公告)号：JPH0588931A
公开(公告)日：1993-04-09
申请号：JP24905391
申请日：1991-09-27
申请人： RICOH KK
发明人： KAWAKAMI HIROSHIGE , MARUO FUMITAKA
IPC分类号： G06F3/12 , G06F11/22 , G06F12/16 , G06F13/00
摘要： PURPOSE:To shorten the time to the communication start of a higher-order device and to use a terminal equipment in the early stage by enabling the terminal equipment to communicate with the higher-order device and performing the self-diagnostic test of a storage device thereafter to considerably shorten the self-diagnosis time of the terminal equipment connected to the higher-order device. CONSTITUTION:When a power source is turned on, a CPU 101 performs the self-diagnosis of each device after initializing each device. Thereafter, only the minimum RAM area required for communication of a resident RAM 103 is subjected to the RAM test. When the preparation for communication is completed at this time, the communication to a host device 107 is set to the ready state, and the self-diagnostic test of the RAM area including an option RAM 105 which is not tested yet is performed. Another area for a bit map or the like is reserved in the RAM area after the end of all of the RAM test, and thereafter, the reception data from the host device 107 is analyzed and the normal printing processing like expansion to the bit map is performed.

10. 发明专利

JPS61297163A PRINTER 失效
公开(公告)号：JPS61297163A
公开(公告)日：1986-12-27
申请号：JP14128485
申请日：1985-06-26
申请人： RICOH KK
发明人： KAWAKAMI HIROSHIGE
IPC分类号： B41J11/66 , B41J11/68
摘要： PURPOSE:To save time in cutting off a feeding hole part and facilitate arranging or filing recorded papers, by providing a cutting mechanism for cutting off a feeding hole part of a recorded paper, at a tractor part. CONSTITUTION:A tractor support means 12 located on the inside of a paper 13 when the paper is set onto a main body of the tractor is provided with a groove 19 at a downstream end part in the paper-discharging direction, and a cutting means 20 is contained in the groove 19. When the paper 13 is pressed by a tractor cover 14, a projected part 23 of the cutting means 20 is pushed by the tractor cover 14, a cutter blade 22 is protruded to the exterior of the support means 12, and is moved into a groove 27 by breaking through a perforation 17 of the paper 13. Then, printing is started, and when the paper 13 is fed in the paper-discharging direction, the perforation part of the paper 13 is cut by the blade 22. Accordingly, the feeding hole part of the paper 13 recorded by a printer is automatically cut off.

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