Perforating; Slitting - Challenge MEDALIST 820 Instructions And Parts Manual

Perforating

Perforating may be used to deliver a perforated sheet flat or as a guide for
additional right angle folds.
The perforating blade (and any additional blades purchased in addition to the
one supplied) is mounted on the upper shaft of the slitter assembly. The perfo-
rating blade is run against the inside edge of the groove in the perforating collar
mounted on the lower shaft, (ill. 6a).
The curved slotted stripper finger is mounted on the square tie bar above the
slitter assembly with one finger on either side of the perf blade. The stripper
finger prevents the paper from wrapping around the perf wheel. It may be ad-
justed by loosening the button head screw in the mounting bracket and moving
the fingers up or down, (ill. 6a). The fingers should be adjusted as close to the
blade as possible without rubbing on it. Contact with the holder will cause pre-
mature wear of the stripper fingers.

Slitting

With the addition of a pair of slitting blades, folded sheets may be cut apart after
folding or before delivery to a right angle cross carrier. Slitting blades are
attached in the same manner as perforating blades. Note that blades are mounted
to blade holders with special flathead countersunk screws. Mount the blade/
holder unit onto the upper shaft in the position the slit is to be made. Position the
second blade/holder onto the lower slitter shaft as shown in illustration 6b above
so that the flat edges of the blades fit together snug (too much space will give
ragged cuts). Slitting blades may also be installed to run against a collar as
shown in the perforating instructions.
F.669-D/820-870/Jan 98
*NOTE: A stripper is required for each perforator blade.
Stripper*
Adjusting
Screw
Perforator Blade
Perforator Collar
Perforating
Scoring
(ill. 6a)
Slitting Blades
(ill. 6b)
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