DIFF Subgroup
B41F 7/02 for offset printing
Introduced: September 1968
Full Title
Rotary lithographic machines > for offset printing
Of 6 combined children, 5 exist in both systems.
1 codes are CPC-only extensions.
Child Classifications
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- B41F 7/04 using printing units incorporating one forme cylinder, one transfer cylinder, and one impression cylinder, e.g. for printing on webs IPC+CPC Available in IPC and CPC
- B41F 7/08 using one transfer cylinder co-operating with several forme cylinders for printing on sheets or webs, e.g. sampling of colours on one transfer cylinder IPC+CPC Available in IPC and CPC
- B41F 7/10 using one impression cylinder co-operating with several transfer cylinders for printing on sheets or webs, e.g. satellite-printing units IPC+CPC Available in IPC and CPC
- B41F 7/12 using two cylinders one of which serves two functions, e.g. as a transfer and impression cylinder in perfecting machines IPC+CPC Available in IPC and CPC
- B41F 7/14 with two or more impression cylinders coacting with a single transfer cylinder IPC+CPC Available in IPC and CPC
Top Applicants
Top Applicants (IPC)
Class B41,2013–2023, worldwide · Source: EPO PATSTAT
- SEIKO EPSON CORPORATION 14,672
- CANON 14,153
- RICOH COMPANY 8,049
- SEIKO EPSON CORPORATION JP 8,044
- HEWLETT-PACKARD DEVELOPMENT COMPANY US 7,312
- BROTHER INDUSTRIES 6,887
- KYOCERA DOCUMENT SOLUTIONS 5,463
- CANON JP 5,001
- KONICA MINOLTA CORPORATION 4,512
- BROTHER INDUSTRIES JP 3,681
Top Applicants (CPC)
Class B41,2013–2023, worldwide · Source: EPO PATSTAT
- SEIKO EPSON CORPORATION 8,446
- SEIKO EPSON CORPORATION JP 8,438
- HEWLETT-PACKARD DEVELOPMENT COMPANY US 7,828
- CANON JP 5,419
- CANON 4,156
- BROTHER INDUSTRIES JP 3,763
- BROTHER INDUSTRIES 2,779
- RICOH COMPANY JP 2,717
- FUJIFILM JP 2,423
- RICOH COMPANY 1,739