device for lifting flaps for closure of letter envelopes.

摘要

Device for lifting letter flaps for moistening in letter feeding and/or letter sealing machines, including a device for separating letters from a stack having separators and eccentric wheels disposed below the separators, a transport cylinder following the separating device in transport direction of the letters and having a cut formed substantially in the middle thereof, first, second and third pressure rollers disposed above the transport cylinder, the first pressure roller being adjustably insertable into the cut for stiffening letters of different thicknesses by bending them in the longitudinal direction thereof in conjunction with the second and third pressure rollers and for lifting the letter flaps, a common lever arm being adjustable for raising and lowering the separators above the eccentric wheels and for raising and lowering the pressure rollers above the transport cylinder for letters of different thicknesses, and a knob having detent steps formed on the periphery thereof in spiral fashion for adjusting the lever arm.