In practice, in most industries there is a conventional setup for the indicia punched on the punch cards in that particular industry, 'for example in the first 13 columns, the description columns 14 through 18 the unit price columns 19 through 22 the vendor code columns 23 through the part number columns 36 through 41 the quantity etc. In this manner the position of the abutments 28 and 29 serve to select the portion or" the card 25 to be read Iwhile the position of the underlying punches 31 in the mask 27 permits transmission of only those indicia in the card 25 registering therewith. The mask 27 may be of a form such as that described in the aforementioned copending application, and have a plurality of punches 31 located at the forward end thereof for permitting reading and transmission of only that indicia in the superimposed punch card 25 registering with the punches 31. 3, the stop may take the form of a mask 27 having laterally spaced abutments 28 and 29 thereon 'for registering with a terminal end 30 of the punch card 25. To this end, stops are provided for insertion in the carriage prior to placing the punch card therein whereby only a limited portion of the card 25, for example up to the fold line 26, may be positioned in the carriage 15. In order that any 22 or 36 consecutive columns or desired portion thereof desired may be transmitted (dependent on the machine type), and in accordance with the invention, means are provided for insertion in the carriage of the machine It) to permit insertion of only a portion of the card in the carriage.
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