Browse Prior Art Database

Roll-To-Roll Film Handler

IP.com Disclosure Number: IPCOM000100007D
Original Publication Date: 1990-Mar-01
Included in the Prior Art Database: 2005-Mar-15
Document File: 3 page(s) / 86K

Publishing Venue

IBM

Related People

Klossner, D: AUTHOR [+4]

Abstract

Disclosed is a film feed and precise, positive posi- tioning device that will unwind a roll of film, feed it through a film-indexing process station, and rewind the film on a take-up roll.

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 65% of the total text.

Roll-To-Roll Film Handler

       Disclosed is a film feed and precise, positive posi-
tioning device that will unwind a roll of film, feed it through a
film-indexing process station, and rewind the film on a take-up roll.

      The film-indexing process station presents top and bottom film
access providing simultaneous two-side film-processing capabilities
at each frame position.

      The sprockets, of the film-indexing process station may be
moved and positioned axially to accommodate various film widths.

      The film-indexing process station may be programmed to operate
either continuously or intermittently.  The latter provides precise,
positive positioning from frame to frame.

      The disclosed device utilizes a unique combination of film
sprocket hole pitch, sprocket tooth pitch and tooth profile, and
sprocket timing to provide maximum tooth-to-sprocket hole engagement,
during indexing of film, while allowing only the center pair of
sprockets to precisely, and positively position each frame of the
film.

      Path of film runs from take-off roll "A" to take-up roll "J"
(Fig. 1).  Film is advanced by sprocket drive transmission (View "A")
one frame advance at a time.  A 180-degree rotation of driver gear
"R", with a location feedback encoder coupled to frame center
sprocket "E" will accomplish a precise frame-to-frame index location.
 Film advance sprockets "D" and "F" have slightly smaller sprocket
teeth to allow film "float" for...