USE OF STATIC ELECTRICITY FOR FILM HOLD DOWN STUDY 220

• Document Type: CREST
• Collection: NGA Records (Formerly NIMA)
• Document Number (FOIA) /ESDN (CREST): CIA-RDP78B04770A002600050003-7
• Release Decision: RIFPUB
• Original Classification: K
• Document Page Count: 4
• Document Creation Date: December 28, 2016
• Document Release Date: December 18, 2002
• Sequence Number: 3
• Publication Date: March 4, 1964
• Content Type: STUDY

Approved For ease 2003/01/28 : CIA-RDP78B0477W2600050003-7
PAR 220
USE OF STATIC ELECTRICITY FOR
FILM HOLD DOWN
STUDY
a)2 6
Date: 4 March 1964
Declass Review by NIMA/DOD
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PROJECT AUTHORIZATION REQUEST
4 Max 64
TASK/PROBLEM
Use of Static Electricity for Film Hold Down
Investigate possible means to hold film flat or in a
given plane through the use of static electricity. Intended use is to
hold films flat in rear projection and direct viewers without a cover-
ing glass or the complexities of a vacuum system.
It is proposed that authorization be granted for the
design and fabrication of breadboard equipments to be used in the
investigation of:
1. Sensitivity of exposed film to static
electrical charges.
2. Study of the dust attraction problem.
3. To study suspension of film in a plane
with or without contact to a hard sur-
face for:
a. Static conditions
b. Dynamic conditions
Complete investigation will require design and fabrication
of two breadboard pieces of equipment.
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 Approved For IJase 2003/01/28 : CIA-RDP78B047702600050003-7
4 Mar 64
Direct Film Viewer - The first breadboard will be
basically a film viewer with a light source, glass platen (that may be
removed) and a mounted microscope for studying film to glass contact
and film flatness. An electrically driven film transport will be
provided and used to study methods of applying and removing electrical
charges as required. A vacuum assist will be incorporated only to the
amount necessary to aid the electrostatic force to hold the film flat.
Rear Projection Viewer Breadboard - The breadboard equip-
ment outlined above will be modified to the degree necessary to simulate
rear projection viewers with high intensity light sources. Investi-
gations and study with this breadboard will cover requirements outlined
above while attempting to hold the film plane in different attitudes,
ie., vertical and horizontally.
Investigation will cover various methods of applying
and removing the electrical charge for all types of photographic film.
The intensity of the field around the film as related to the hold-
down force, and a tendency to collect dirt (dust) will also be studied
and reported. Conducting and non-conductive glass platens will be in-
vestigated along with the determination of the feasibility of attempt-
ing to hold film flat by electrostatic means in an air space.
Investigation will be limited to processed film only.
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 Approved For Wease 2003/01/28: CIA-RDP78B0477 2600050003-7
*0 9
PROGRAM OBJECTIVE
The objective of this study will be a final report dis-
cussing in detail all approaches studied during the course of this in-
vestigation. The report will also contain recommendations for
1. Desireability of additional study in
this area, or
2. Feasibility of employing static elec-
tricity for film hold down.
3. Recommended design specifications for:
a. Direct film viewers
b. Rear projection film viewers.
-3-
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