the paper entering the throat 66 there is a downward rearward slanted guide 67 above the platen 42 bores 68 are formed in the die bar 61 extending down through the body of the die bar into registry with the holes 67 it will be seen that the bores 68 intersect throat 66 vertically reciprocating above die bar 61 is a transverse punch bar 71 having cavities 72 corresponding in number to the bores 68 formed extending upward from its bottom surface in alignment with bores 68 each cavity 72 has a lesser diameter upward extension 75 the punch bar 71 has a flat top 73 received in each cavity 72 is a punch pin 28a formed with a male punch die 29a at its bottom end near the top 31a of each pin 28a is a collar 32a formed of a plastic material similar to the head 32 of the preceding modification thus there is a groove 36a formed in pin 28a spaced downwardly from the upper end 31a thereof the plastic molded collar 37a has an inward protrusion 38a which substantially fills the groove 36a coil springs 79 at their upper ends bear against collar 37a the lower ends of the springs 79 bear against the die bar 61 the portions of the ends 28a above the collar 22a extend into extension 75 hence the springs 79 bias the punch pins 28a upward in the cavity 72 and.