IBM 80 User Manual

MECHANICAL AND ELECTRICAL PRINCIPLES 19
Upper Front Card Guid"
Throat Knife
Rear Card Guide Post
__ J«---t-l1 Connecting Link
Continuou.ly running Feed RollI
Fi~ure 17. Feed Knife Operation
to pick another card from the bottom of the pack.
While the knives are returning, the
first card con-
tinues its travel to the left under control of the
continuously running
feed rolls. The stroke of the
knives is so timed that, as the trailing edge of the
first card leaves the magazine, the second card is
Feed Knife
Slide Assembly
Knife Slide
Adjulting Stud
~
~~~
cO ~j~
Card Feed Knife
Feed Knife Holder
Fi~ure 18. Feed Knife Slide Assembly
picked up by the knives and is fed through the
throat, following the first card
by a distance of %0".
This process is repeated for the feeding of all cards.
Feed Rolls (Figure 19)
The feed rolls furnish the means of recelvmg the
cards from the feed knives and transporting them
past the card brush and sort magnet stations and on
to their proper pockets. There are fifteen sets of feed
rolls in the machine. The
first three sets nearest to
the card magazine differ somewhat from the other
twelve.
All the upper
feed rolls consist of two rubber rolls
pressed on a steel shaft. The first 3 upper rolls are
driven
by 19-tooth worm gears meshed with the drive
shaft. The remaining
12 upper rolls are not direct
driven, but are driven
by friction from their matching
lower rolls. Except for the second position, each lower
feed roll consists of two steel rolls pressed on a steel
shafr. At the second position, the lower feed rolls con-
sist of two small auxiliary rolls mounted
on separate
shafrs and bolted to the side frame. These auxiliary rolls

IBM 80 Specifications

General

Brand	IBM
Model	80
Category	Office Equipment
Language	English