Journal of the SMPTE ( Volume: 77, Issue: 9, September 1968)
[ACTIVE]
Wear of Permalloy Magnetic Heads against Striped Motion-Picture Film
Metadata
- Publisher
- SMPTE — White Plains, NY, USA
- Doc Type
- Journal Article
- Content Type
- Original Research
- Abbreviated Title
- J SMPTE
- Volume
- 77, No. 9, pp. 912–919
- Abstract
- A simplified abrasion tester has been developed to study the action of a head against the magnetic stripe on motion-picture film, and to investigate the factors affecting head life. In a study using only permalloy dummy heads, the data over the range of variables normally encountered in motion-picture work can be correlated by the equation where A = loss of metal per unit width of the head, L = length of stripe run against the head, and kf and kh are abrasiveness factors characteristic of the film and head respectively. P, M and V are the pressure of the head against the stripe, the contact or chord length of the head and the film velocity respectively. Head pressure can be chosen within limits by the systems designer; it is found advantageous to work at low levels. Accordingly, the control of the stripe presentation to the head and the uniformity of that presentation is preferably controlled by means other than head pressure, such as by film-path constraints. This work is being extended into a study of other polepiece alloys and into very high-speed magnetic transfer.
- Publication Date
- 1968-09-01
- DOI
10.5594/J16732- ISSN
- Print:
0361-4573 - Link
- https://doi.org/10.5594/J16732
- Author(s)
- F. J KolbEastman Kodak Co., Manufacturing Experiments Div., Bldg. 35, Kodak Park, Rochester, N.Y. 14650R. S. PerryEastman Kodak Co., Manufacturing Experiments Div., Bldg. 35, Kodak Park, Rochester, N.Y. 14650
- Copyright
- © 1968 Society of Motion Picture and Television Engineers, Inc.
Bibliographic Reference(s)
- Replaceable Pole Tip Caps for CinemaScope Magnetic Reproduce Heads [Active]
- Design Considerations for a High-Efficiency Contact Motion-Picture Printer with Magnetic Sound Transfer and Monitoring [Active]
- Recent Developments in Magnetic Heads for Use in Motion Pictures [Active]
- A Four-Track Magnetic Transducer with Replaceable Working Gaps [Active]
- 10. Rettinger M. : “Magnetic head wear investigation,” Jour. SMPTE , 61 : 179 – 183 , Apr. 1955 . EXTERNAL
- 12. Wilson A. M. : “Reliability and drop-out studies for long playing loops,” IRE Conv. Rec. , Vol. 8 , Pt 9: 170 – 178 , 1960 . EXTERNAL
- 13. Wood R. H. : “How to improve video head and tape life,” Broadcast News, RCA ; Vol. 137 , Jan. 1968 . EXTERNAL
- 2. Bourot J. M. : “Quelques résultats concernent lusure des bandes magnétiques,” Rev. Son. , 66 : 252 – 253 , Oct. 1958 . EXTERNAL
- 4. Carroll J. F. Jr. Gotham R. C. : “The measurement of abrasiveness of magnetic tape,” IEEE Trans MAGNETICS MAG-2 : 6 – 13 , Mar. 1966 . EXTERNAL
- 5. Grimwood W. K. Horak J. R. ; “Sound recording on magnetic tape, Part 20: the effect of repeated use on sound recording quality,” Feb. 19, 1954 Eastman Kodak Tech Memo 9867 (unpublished). EXTERNAL
- 6. McKnight J. G. : “Tape reproducer response measurements with a reproducer test tape,” J. AES , 15 : 152 – 156 , Apr. 1967 . EXTERNAL
- 8. Morrison R. K. : “Reproducer test tapes: evolution and manufacture,” J. AES , 15 : 157 – 162 , Apr. 1967 . EXTERNAL
- 9. Rabinowicz E. : Friction and Wear of Materials , Wiley ( New York ) 1965 . EXTERNAL
Source Data (JSON)
Full registry record with provenance metadata. Open directly: /api/doc/10.5594-J16732.json
Reference Tree
Explore all references and references to this document, as a navigable tree.
Open Reference TreeReference this Doc
Plain text (ISO 690 compliant)
Preview:
F. J Kolb and R. S. Perry; Wear of Permalloy Magnetic Heads against Striped Motion-Picture Film, Journal of the SMPTE ( Volume: 77, Issue: 9, September 1968); SMPTE, 1968. Available at https://doi.org/10.5594/J16732
Snippet:
F. J Kolb and R. S. Perry; Wear of Permalloy Magnetic Heads against Striped Motion-Picture Film, Journal of the SMPTE ( Volume: 77, Issue: 9, September 1968); SMPTE, 1968. Available at https://doi.org/10.5594/J16732
HTML (ISO 690 compliant)
Preview:
F. J Kolb and R. S. Perry; Wear of Permalloy Magnetic Heads against Striped Motion-Picture Film, Journal of the SMPTE ( Volume: 77, Issue: 9, September 1968); SMPTE, 1968. Available at https://doi.org/10.5594/J16732
Snippet:
<span class="citation">F. J Kolb and R. S. Perry; <cite>Wear of Permalloy Magnetic Heads against Striped Motion-Picture Film</cite>, Journal of the SMPTE ( Volume: 77, Issue: 9, September 1968); SMPTE, 1968. Available at <a href="https://doi.org/10.5594/J16732" target="_blank" rel="noopener">https://doi.org/10.5594/J16732</a></span>
SMPTE's HTML Pub
Preview:
F. J Kolb and R. S. Perry; Wear of Permalloy Magnetic Heads against Striped Motion-Picture Film, Journal of the SMPTE ( Volume: 77, Issue: 9, September 1968); SMPTE, 1968
doi: 10.5594/J16732
url: https://doi.org/10.5594/J16732
doi: 10.5594/J16732
url: https://doi.org/10.5594/J16732
Snippet:
<li> F. J Kolb and R. S. Perry; <cite id="bib-10-5594-j16732">Wear of Permalloy Magnetic Heads against Striped Motion-Picture Film</cite>, Journal of the SMPTE ( Volume: 77, Issue: 9, September 1968); SMPTE, 1968 <span class="doi">10.5594/J16732</span> </li>
Referenced By
- Technical Experience with Datakode™ Magnetic Control Surface [Active]
- Equipment and Film Parameters for Optimum Magnetic Sound Transfer on Super-8 Print Film [Active]
- Language Training of Adults Using Motion-Picture Film Loops [Active]
- Telecine Reproduction of Motion-Picture Audio [Active]
- Audio Performance of Magnetic Prestriped Super-8 Motion-Picture Films [Active]