Perforating Mechanism
THE PERFORATOR is equipped with a
mechanism that perforates code combinations containing
one to six holes (plus a tape feed hole) in the tape
each time a key is depressed.
Starting to Perforate Tape
WITH TAPE INSERTED in the punching unit and the
tape control lever and the power switch both in the
"on" position, the Perforator is ready for operation.
Before starting to perforate tape, the
Operator should "condition" the Perforator as follows;
With the punch control lever in the left or "on" position, depress the RETURN, ELEV, and UNSHIFT keys. This assures the Operator that the pointers are at the starting position and the Perforator is in the unshift
position.
Depress the TAPE key and REPEAT key simultaneously until all code perforations in the tape are advanced
past the knife edge, then tear off this piece of tape by lifting and twisting. Feed out enough blank tape
("tape" combinations) to provide space for writing the name of the item, the size of type, or any other
information desired.

1 SCALE DIVISION = 1 EM SPACE
OR 2 EN SPACES
EACH FULL SCALE division on the
counting scale represents a thickness
equivalent to the EM space for that
particular font of type. Onehalf of a scale
division represents an EN space which is
onehalf the width of the EM space (see Figure 47) .
The counting pointer is arranged to move
from left to right along the counting scale
in varying amounts proportional to the
width of the characters added to the line
as the various key levers are depressed.
The starting point of the counting pointer
is adjustable and should be positioned to conform to the column measure of the composition to be set.
§ § § § § §
When using unit system matrices, the EM space has a count value of 18 units, and all other alphabet
characters, figures, punctuation marks and special characters have a count value directly proportional to
the EM space. When using the Multiface Perforator and nonunit system matrices, the EM space has a
count value of 32 units, and the other characters with a counting value proportional to the EM space being
used. The below list shows the character grouping for 18 unit matrices.
§ § § § § §
Unit Size 6 Period, Comma, Apostrophe, Hyphen, Vertical Rule, Quote, Thin Space, Lower case i
7 Lower case j f t 8 Capital I
9 All figures, $, Pound sterling, Semicolon, Colon, Exclamation, EN leader. Asterisk
Left and right hand brackets, All reference marks, Figure spaces, Lower case r s z, En dash and ( )
10 Lower case c e o
11 Lower case a b d g h n p q u v x y k fi, fl, Capital J S ?
12 Capital Z 13 Capital C T L ff
14 Lower case ae, Capital A B F O P Q V &
15 Lower case w oe, Capital D E G R U X Y H K N
18 EM space, EM leader, EM dash, EM fractions, % Ib, Capital M W OE, AE, Lower case m, ffi, ffl, @
The counting pointer moves one full scale division on the counting scale for each 18 unit value (unit
system matrices) or 32 unit value (nonunit system matrices) . Accordingly, when the Perforator is used to
count matrices with an EM space value of .1107", the counting pointer moves a full scale division for each
.1107" of type. The theoretical counting pointer setting for any column measure is therefore determined by
dividing the column width (measured in inches) by the EM space value (.1107"). Likewise, when the
Perforator is used to count matrices with an EM space value of .100", the counting pointer setting can be
calculated by dividing the column width (measured in inches) by .100".
Sample Calculation for Counting Pointer Setting for Matrices
With EM Space Value of .1107” (see below) Column measure (average newspaper column) 12 picas
Column measure in inches 12 x .166" = 1.992"
Value of EM space .1107" Theoretical setting 1.992" ÷ .1107" = 18 div. Allowance to provide margins against the
possibility of sending tight lines into the vise 2 div.
Counting pointer setting 17.8 div.
