National Cash Register Class 500 User Manual - page 13
Page 13
To remove back printing cylinder turn knob “G” until the word “OFF” is in correct reading
position.
Raise lever “Z” and remove cylinder by pulling to the right. This cylinder is carried by a stud
having an eccentric sleeve held in position by the clutch “R.” This sleeve governs the
impression of the back printing cylinder and is regulated by loosening, the screw in clutch “R”
and moving sleeve backward or forward. Moving the sleeve toward the front of register throws
the cylinder closer to the rubber roll and gives more impression. Moving the, sleeve toward the
back of register throws the cylinder farther away from the rubber roll and gives less impression.
Note -- A small screwdriver will be found in the supply box for attaching the electros. Care must
be taken not to mar any of the letters. If any part of the background on the electro marks the
check, locate the place and pound it down lightly with a small, blunt instrument.
Care of Printing Device
Oil the check cutting-off knives once a month. This will keep a smooth edge on the knives.
The printing type numbering wheels and electro should be cleaned with benzene; use the small
brush sent with the register. This will prevent the ink clogging the wheels and a clean, clear
check will be issued.
It is important that the register be inked regularly, as a bright, clean check creates a much
better impression on a customer and is of more value to a merchant than one which is barely
legible and one which shows lack of attention.
Change electros periodically, as this form of advertisement is valuable to a merchant if properly
used.