Claims
- 1. A method of manufacturing a photographic film cassette having a cassette shell, a spool rotatably mounted in said cassette shell, and a photographic filmstrip coiled about said spool, said photographic filmstrip being entirely located in said cassette shell, and a leading end of said photographic filmstrip having a magnetic recording layer formed thereon and being advanced out of said cassette shell through a film passage mouth formed in said cassette shell by rotating said spool in an unwinding direction, said method comprising the steps of:recording first data with a first magnetic recording head on a lateral edge of said photographic filmstrip; recording second data with a second magnetic recording head on said leading end of said photographic filmstrip; loading said photographic filmstrip in said cassette shell after said recording step; reading said first and second data upon advancing said leading end after said loading steps; and winding said leading end back into said cassette shell by rotating said spool in a winding direction.
- 2. A method of manufacturing a photographic filmstrip having a predetermined length cut by a cutter, perforations formed at regular intervals along at least one lateral edge of said photographic filmstrip using a perforator, and first data magnetically recorded on said at least one lateral edge by a first magnetic recording head, and second data magnetically recorded on at least one of leading and trailing ends of said photographic filmstrip by a second magnetic recording head, said method comprising the steps of:maintaining a length of said photographic filmstrip at a predetermined constant value between said perforator and said first magnetic recording head, such that said first data is recorded in association with each image frame exposure area on said photographic filmstrip; and maintaining a length of said photographic filmstrip at a predetermined constant value between said cutter and said second magnetic recording head, such that said second data is recorded on said leading and trailing ends of said photographic filmstrip.
Priority Claims (3)
Number |
Date |
Country |
Kind |
4-206653 |
Aug 1992 |
JP |
|
4-272987 |
Oct 1992 |
JP |
|
4-326982 |
Dec 1992 |
JP |
|
Parent Case Info
This is a divisional of application Ser. No. 08/924,138, filed Sep. 5, 1997, now U.S. Pat. No. 6,141,852, issued Nov. 7, 2000, which is a divisional of Ser. No. 08/542,867, filed Oct. 13, 1995, now U.S. Pat. No. 6,289,653, issued Sept. 18, 2001, which is a divisional of Ser. No. 08/100,966, filed Aug. 3, 1993, now U.S. Pat. No. 5,479,691, issued Jan. 2, 1996, the disclosures of which are incorporated herein by reference.
US Referenced Citations (14)
Foreign Referenced Citations (5)
Number |
Date |
Country |
0082675 |
Dec 1982 |
EP |
634036 |
Feb 1988 |
JP |
2222946 |
Sep 1990 |
JP |
3-2905 |
Jan 1991 |
JP |
9004254 |
Apr 1990 |
WO |