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The ribbon mechanism shown in the drawing permits the insertion of the drive wheel into a cartridge to act on the takeup spool within the cartridge to accomplish feeding.
English (United States)
This text was extracted from a PDF file.
At least one non-text object (such as an image or picture) has been suppressed.
This is the abbreviated version, containing approximately
68% of the total text.
Page 1 of 2
Film Ribbon Rephase Mechanism
The ribbon mechanism shown in the drawing permits the insertion of the
drive wheel into a cartridge to act on the takeup spool within the cartridge to
Feed is accomplished by the oscillation of link 10 which in turn pulls feed arm
12 in a counterclockwise direction, effectively forcing pawl 14, in the form of a
spring finger, into an aperture 16. As pawl 14 engages aperture 16 and is
further rotated, the disk 18 carrying teeth 20 will be rotated. As small movements
of link 10 are accomplished, the pawl 14 will continue to urge the disk 18 in small
increments until such time as the pawl 14 is allowed to engage the next
succeeding aperture 16.
Withdraw link 22 may be used to extract the entire ribbon feed mechanism
from within the cartridge 24. As pawl 22 is pulled in the direction of the arrow
thereon to withdraw the feed mechanism from the cartridge, the ribbon feed
mechanism will rotate about pivot pin 26. To insure that any partial feeds of
wheel 18 are held so that upon reinsertion of the feed mechanism into the
cartridge 24, the wheel will begin rotating at its previous phase relationship
between pawl 14 and aperture 16, a locking pawl 30, spring biased by spring 32,
is provided and supported on support member 34.
With the pulling of link 22, link 22 may slide past post 36 to its elongated slot
38, thus engaging the edge 40 of link 22 with the end of arm 42. Further
movement of arm 42 will cause the teeth of p...