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Print drum for a postage meter
| Details |
Inventors: Bannister, Raymond L.; Close, Frederick C.; Loeber, Peter J.;
Assignee: Pitney Bowes Inc. (Stamford, CT)
Primary Examiner: Crowder; Clifford D.
Assistant Examiner:
Attorney, Agent or Firm: Parks, Jr.; Charles G., Pitchenik; David E., Scolnick; Melvin J.
A print drum for a postage meter has a drum structure provided with a plurality of recesses in its periphery. One of these recesses accommodates a print wheel assembly and at least some of the other recesses are provided with axially extending means whereby imprinting dies can be slid in and out. The movement in and out of the recesses is in a direction substantially parallel to the rotation axis of the print drum. |
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DETAILED DESCRIPTION According to the present invention, there is provided a print drum for a postage meter, comprising: a drum structure defining a drum longitudinal axis, an outwardly facing printing region and a plurality of recesses within said printing region, a print wheel assembly housed within said drum structure having means for remotely adjusting the print wheels of said assembly, longitudinal guide means associated with said recesses, at least one imprinting die constructed for sliding movement on said longitudinal guide means in and out of one of said recesses in a direction substantially parallel to said print drum axis, and spring biased detent means for releasably locking the imprinting die in its printing position within the respective drum recess.
In a preferred version of the present invention, the printing drum includes spaced first and second part circumferential driving bands at either side of the printing region.
Advantageously, at least one of said driving bands is defined by aligned driving band portions provided on the imprinting die and the drum structure respectively.
Advantageously, one of the recesses is adapted slidably to receive an imprinting die in the form of a dater wheel assembly.
It is preferred for the dater wheel assembly to include a plurality of rotatable printer wheels for printing a date, and a respective finger wheel drivably associated with each of said printer wheels.
An important advantage of this arrangement is that a dater wheel assembly, a component which is commonly secured in a print drum, can be slid out axially which means that manual adjustment of the date shown by the date wheels of such an assembly can readily be done.
With prior art print drums, it has been found necessary to "pick" over the wheels of the dater assembly using a sharp tool in order to adjust the date each morning before the postage meter is used.
This picking over process may well damage the digits of the dater wheels leading to a degradation in the image produced on the franked envelope, and is in any case an irritating and time-consuming procedure
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Finance 
