GB1349857A - Web advancing mechanism - Google Patents
Web advancing mechanismInfo
- Publication number
- GB1349857A GB1349857A GB2101871A GB2101871A GB1349857A GB 1349857 A GB1349857 A GB 1349857A GB 2101871 A GB2101871 A GB 2101871A GB 2101871 A GB2101871 A GB 2101871A GB 1349857 A GB1349857 A GB 1349857A
- Authority
- GB
- United Kingdom
- Prior art keywords
- film
- motor
- frame
- signal
- belt
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B1/00—Film strip handling
- G03B1/18—Moving film strip by means which act on the film between the ends thereof
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Projection-Type Copiers In General (AREA)
- Controlling Rewinding, Feeding, Winding, Or Abnormalities Of Webs (AREA)
- Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
Abstract
1349857 Cinematography EASTMAN KODAK CO 19 April 1971 [6 Feb 1970] 21018/71 Heading G2E A mechanism particularly for the transport of unperforated film includes a continuous, flexible, transparent belt 21 which carries film 11 through an area illuminated by lamp 12. The film 11 is drawn from a spool 14 and received on spool 24. Roll 17 is driven by motor 18 and rolls 22, 23 rotate due to contact with the belt 21. The belt 21 is of a shallow U-cross section so that the film 11 fits therein and does not project above and is fictionally gripped by its sides. The film may be advanced intermittently or continuously. In the former arrangement a regular pulse from a clock circuit (72), Fig. 3, (not shown), causes an amplified output from a waveform generator (73) to drive the motor 18 long enough to move the film through one frame. The same pulse from the clock (72) is also electronically delayed so that it can actuate an optical detector (74) to determine whether the frame is correctly aligned for projection and, if not, to send a correction signal to the motor 18 to reposition the frame. In an alternative circuit, Fig. 5, (not shown), no correction signal is transmitted to the motor 18 but a differential optical detector (94) checks the position of the frame as before and by combination of its output with a reference signal from a source (102) the net signal modifies the gain of amplifier (93) which amplifies the signal from the waveform generator to the motor 18 to correct subsequent film movements.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US917270A | 1970-02-06 | 1970-02-06 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1349857A true GB1349857A (en) | 1974-04-10 |
Family
ID=21736012
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2101871A Expired GB1349857A (en) | 1970-02-06 | 1971-04-19 | Web advancing mechanism |
Country Status (4)
Country | Link |
---|---|
US (1) | US3715090A (en) |
DE (1) | DE2105410A1 (en) |
FR (1) | FR2078114A5 (en) |
GB (1) | GB1349857A (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3797720A (en) * | 1972-08-01 | 1974-03-19 | Ambrit Inc | Numerically controlled work transport for forming press |
US4095732A (en) * | 1976-12-29 | 1978-06-20 | Xerox Corporation | Method and apparatus for accurately controlling the position of a film transport device |
US4335411A (en) * | 1980-01-28 | 1982-06-15 | Rca Corporation | Length counter for web transport system |
GB2089060B (en) * | 1980-12-08 | 1984-05-31 | Philips Electronic Associated | Telecine projector |
DE3144333A1 (en) * | 1981-11-07 | 1983-05-19 | Johannes 4172 Straelen Lörsch | Device for transporting film material |
US6283396B1 (en) * | 1999-12-02 | 2001-09-04 | Storage Technology Corporation | Tape transport using a carrier ribbon with edges |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3026056A (en) * | 1960-04-06 | 1962-03-20 | Watrous A Nielsen | Accounting apparatus |
US3222003A (en) * | 1963-05-23 | 1965-12-07 | Fritz A Guerth | Drive mechanism for tape recorders and/or reproducers |
US3421673A (en) * | 1965-11-26 | 1969-01-14 | Hokushin Electric Works | Automatic film threading device |
US3549104A (en) * | 1967-10-23 | 1970-12-22 | Par Ltd | Tape transport mechanism |
-
1970
- 1970-02-06 US US00009172A patent/US3715090A/en not_active Expired - Lifetime
-
1971
- 1971-02-03 FR FR7103535A patent/FR2078114A5/fr not_active Expired
- 1971-02-05 DE DE19712105410 patent/DE2105410A1/en active Pending
- 1971-04-19 GB GB2101871A patent/GB1349857A/en not_active Expired
Also Published As
Publication number | Publication date |
---|---|
US3715090A (en) | 1973-02-06 |
FR2078114A5 (en) | 1971-11-05 |
DE2105410A1 (en) | 1971-10-14 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed [section 19, patents act 1949] | ||
PCNP | Patent ceased through non-payment of renewal fee |