IBM 1620 - Page 88

Loading the Pap er T ap e Reader
Paper t ape can be handled in two forms. Th e proc e-
dures for loading each fonn vary slightl y. The nam es
of machine components us d in th following de 'crip-
tions of loading proce dur es are given in Figur 4.
CENTER ROLL FEE D
The cent 1'1'0 11 feed Hminat es the nec s it y for I' wind-
ing pap er tape rolls which would ex pose the starting
end of the tape on the outsid of th tap roll. Figure
5 shows that tap e is suppli d from the inside of the
center roll fe d, to the supply reel arou nd th I' - ad
he ad , and onto the take-up I' e l.
Th proc dur e for loading pap I' tape from th center
roll fe d is as follows:
1. Position the reel strip switch to R EE L.
2. Pl ace the reel buffer arms in th upp I' latched
po ition s.
3. Op n thc tape guid s and form an inve rt ed
with th c nt er ec ti on of th fir st eight F e' t of
Figure 5. Center Ro ll Feed Loaded
pap er tap . Wr ap the paper tap e arou nd th read
head wi th suffici nt tension to keep the runout a nd
tap e tension co nt acts closed. Sta rt on the tak -up
r I sid of the r ead h ad. Run a fin ger up over the
tape on top of the read head, moothing the tape
down with a firm, mod rat e pr e sure so th at the
tap e tension b ar is s li ghtly de pr sed and th
ri g ht si d of the feed pinwheel engages the t ap
f d hoI s. Be careful not to tear the feed hoi s.
Th e tap feed hal s must mesh with both sid s
of the pinwl e l.
4. Clos the tape guides.
5. Thr ead th l ading s ction of pap er tape under
the guid roll r, between the stationary bu ff r
ro ll ers a nd buffer arm roll r s, and o nt o th tak e- up
reel, as shown in Figure 5.
6. Thr ead th pap er tap fr om th ri g ht id e of the
r ad h ad under the guide roller, b tw ee n th
stationarv buff r rollers and buffer arm rollers,
o r th . supply r el ( the rubb er drive hub must
App endix B 87