and optionally cutting out the imprinter while the bag closing machine continues to run but it provides for effecting the contact of the type faces of metal with the foil ribbon at a relatively slow speed and with magnified power produced by a relatively light weight low powered electric motor 67 fig1 illustrates the part played by the cam 81 and follower roller 83 in this economically meaningful power printing system to recapitulate the cam 81 is normally stationary keyed to shaft 51 which is integral with clutch shaft 52 the lower end of which has fixed thereon the lower half 54 of clutch 53 and the upper half 56 of which clutch turns continuously with the sprocket 58 fixed thereon the motor 67 rotates constantly at 1700 rpm and drives sprocket 58 at 238 rpm or at 4 rps which produces one complete cycle in one quarter second each imprinter cycle starts and stops with the clutch control dog 55 held against rotation by the hardened clutch stop 236 fig8 withdrawal of the latter starts a printing cycle and a quick return thereof behind said dog terminates the cycle forthwith upon the dog engaging the stop one quarter of a second later due to the low amount of inertia residing in the cam shaft and.