US 3412679 A
Description (OCR text may contain errors)
Nov. 26, 1968 H. NIRENBERG 3,412,679
FRANKING MACHINES Filed Jan. 28, 1966 2 Sheets-Sheet 1 Wren r04 Hams IVlRE/VBERS HTToR /Eys Nov. 26, 1968 NlRENBERG 3,412,679
FRANKING MACHINES Filed Jan. 28. 1966 2 Sheets-Sheet 2 wn-wroe Hams /VIRE/VBER5 fiTroRlvEg s United States Patent "ice 3,412,679 FRANKING MACHINES Hans Nirenberg, Frankfurt am Main, Germany, assignor to Telefonbau und Normalzeit G.m.b.H., Frankfurt am Main, Germany, a German joint-stock company Filed Jan. 28, 1966, Ser. No. 523,739
Claims priority, application Germany, Aug. 31, 1965,
2 Claims. (Cl. 101-314) ABSTRACT OF THE DISCLOSURE A franking machine is described wherein a blocking member is provided for preventing unauthorized printing by means of a value stamp to frank an article to be posted after the value stamp has been inked by an inking roller of the machine and before authorized printing has been effected and the inking roller returned in a position in which the inking roller prevents unauthorized printing.
The present invention relates to franking machines with devices for preventing fraudulent printing of a stamp value.
With franking machines having a stationary value stamp and a pressure plate for moving an article to be franked against the stamp, there is the danger that after inking of the value stamp articles to be franked may be pressed by hand against the value stamp without actuation of the drive of the franking machine, and thereby a fraudulent printing of the stamp may be effected.
An object of the present invention is to provide a franking machine which incorporates novel means for preventing, or at least rendering diflicult, fraudulent printing by the value stamp thereof.
According to the present invention, a franking machine has a value stamp, a support member for supporting an article to be franked, a blocking member, first displacement means for positively moving said blocking member into a blocking position in which said blocking member prevents printing by said value stamp, second displacement means for effecting relative movement of said value stamp and said support member, and means for removing said blocking member from said blocking position in response to said relative movement to allow franking of said article to be franked on said support member.
Further objects and features of the present invention will be apparent from the following description thereof taken in conjunction with the accompanying drawings, wherein:
FIG. 1 shows the control mechanism of a blocking lever, of an inking device, and a support plate for an article to be franked of a franking machine according to the present invention;
FIG. 2 shows the same mechanism as FIG. 1, but in another position;
FIG. 3 shows the same mechanism as FIGS. 1 and 2, but in yet another position;
FIG. 4 shows a plan view of the free end of a blocking member of FIGS. 1, 2 and 3; and
FIG. 4a shows a section through the free end of the blocking member shown in FIG. 4.
As shown in FIG. 1, a lever 5 and a toothed segment 42 are secured on a stationarily mounted shaft 4 and can be moved together to and fro by a drive, which is not illustrated. The lever 5 has a bifurcated end engaging a pin 35 on the rear end of a slide 1 which is mounted so as to be horizontally movable and carries an inking roller 2 for inking a stamping surface 3 of a stationary value sarnp 6. The lever 5, the pin 35 and the slide constitute first displacement means for displacing the inking roller 2 3,412,679 Patented Nov. 26, 1968 for inking the stamping surface 3 of the value stamp 6. In the rest position (FIG. 1) the inking roller 2, is disposed in front as seen by the operator, of the value stamp 6 and normally makes the value stamp 6 inaccessible.
The pin 35 on the slide 1 engages in a slot 37 in an arm 26 of a blocking member 7 constructed as a double-armed lever pivotally mounted on a stationary shaft 38 and subject to the action of a spring 32. While the pin 35 is disposed in a horizontal part of the slot 37 in the lever arm 26, the spring 32 is not able to pivot the blocking member 7. The free end of the blocking member 7 is formed with branches 13, 14 and 16 (FIGS. 4 and 4a) which extend around the value stamp 6 and a date stamp 39. The lower edges of the branches 13, 14 and 16 are formed with sawtooth-like cutting edges 15.
As soon as the slide 1 is drawn so far back by the movement of the lever 5 that its front edge 8 is disposed approximately beneath the middle of the value stamp 6, the pin 35 arrives at an inclined part 40 of the slot 37 (FIG. 2). Thereby, the spring 32 is able to pivot the blocking member 7 and the sawtooth-like cutting edges 15 of the branches 13, 14 and 16 move beneath the stamping surface 3 of the value stamp so that a letter inserted by hand into the gap between the value stamp 6 and a pres sure plate 10 cannot be pressed against the stamping surface 3 of the value stamp 6.
The toothed segment 42, pivoted with the lever 5, meshes with and rotates a toothed wheel 33 on a positive drive cam disc 17 arranged on a stationarily supported shaft 34. A pin 36 on a double-armed lever 19 which is pivotable about a stationary shaft 18 engages in a circularly curved slot in the cam disc 17. One end of the slot in the cam disc 17 extends radially outwardly as shown. The left arm of the lever 19 as viewed in FIGS. 1, 2 and 3, carries a pin 20 which engages in a slot in a lever 21 carrying the pressure plate 10 for supporting an article to be franked, the lever 21 being 'pivotably mounted on the stationary shaft 18.
By means of a spring 22 the lever 21 is resiliently connected to the lever 19, the extent of the movement of the levers 19 and 21 relative to one another being limited by the length of the slot receiving the pin 20. When the toothed segment 42 rotates the toothed wheel 33 and therewith the cam disc 17, the pin 36 on the lever 19 slides along the slot in the cam disc 17 and reaches the radially outwardly extending part 41 of said slot as can be seen by a comparison of FIGS. 1 and 2 with FIG. 3. Since the end of the radially outwardly extending part 41 of said slot has a greater distance from the shaft 34 about which the cam disc 17 rotates than the circularly curved part of said slot, the pin 36 is moved by the slot away from the shaft 34 when reaching the outwardly extending part 41 of said slot, such outward movement of the pin 36 causing the lever 19 to be pivoted out of its position shown in FIGS. 1 and 2 into its position shown in FIG. 3.
'Thereby, the pressure plate 10 is moved towards the printing surface 3 of the value stamp 6, and the article 11 is moved by the pressure plate 10 against the lower edges 15 of the branches 13, 14, 16 of the blocking member 7, the pin 35 runs onto the flank 12 of the slots 37.
The pin 36, the double-armed lever 19, and the spring 22, thus, constitute second displacement means for moving, through the lever 21, the pressure plate 10 for supporting the article 11 towards the stamping surface 3 of the value stamp 6. The flank 12 of the slot 37 is so arranged with respect to the radially outwardly extending part 41 of the slot in the cam disc 17 that the front edge of the blocking member 7, which is raised to the level of the stamping surface 3 by the pressure plate 10 and the postage article 11, inserted as far as the abutment 9, cannot previously be raised.
The lever 21 carrying the pressure plate is formed as an elbow lever having an arm 23 to which a locking member 24 is pivoted and coupled urged towards the lever 21 by means of a spring 29, the locking member 24 having at its free end a toothing 25 and an inclined surface adapted to bear against a stationary abutment 31. This toothing 25 co-operates with a catch 28 which is pivotably mounted by a pin 27 on the arm 26 of the blocking member 7. A second stationary abutment is provided for co-openation with the catch 28.
In the position of the mechanism illustrated in FIG. 1, the locking member 24 bear with its inclined end surface against the abutment 31, whereas the catch 28 is clear of the second abutment 30 and is out of engagement with the toothing 25 0f the locking member 24, the blocking member 7 being in its raised position while the inking roller 2 prevents an article from. being inserted between the printing surface 3 and the support 10 for fraudulent printing.
In the position of the mechanism illustrated in FIG. 2, the locking member 24 still bears against the abutment 31 and the catch 28 bears against the second abutment 30 to prevent the catch 28 from engaging the toothing 25 of the locking member 28. The blocking member 7 is lowered to prevent fraudulent printing. It. will be noted that in this position the pin 35 on the slide 1 is within the inclined part of the slot 37 in the arm 26. The inclined part 40 of the slot 37 prevents any rotation of the arm 26, and therewith the blocking member 7, about the shaft 38. Thereby, it is prevented that the blocking member 7 can be pushed upwards for enabling fraudulent printing.
In the position of the mechanism illustrated in FIG. 3, the locking member 24 and the catch 28 are clear of the respective abutments 31, 30, and the catch 28 has engaged the toothing 25. Thereby, the blocking member is rigidly connected to the lever 21 through the catch 23 and the locking member 24.
While the catch 28 bears against second abutment 30, adjustment of the position of the catch 28 relative to the toothing 25 is possible to an extent which corresponds to the thickness of the article 11. The toothing 25, thus, can be displaced relative to the catch 28 under the action of the movement of the lever 21 until the article 11 on the plate 10 has reached the blocking member 7 and begins to raise the blocking member 7. The raising of plate 10 and the blocking member 7 causes the catch 28 to engage the toothing 25 slightly before the position illustrated in FIG. 3 has been reached.
The engagement between the toothing 25 of the locking member 24 and the catch 28 prevents fraudulently to press the plate 10 downwards without imultaneously moving the blocking member 7 downwards after the pin 35 has entered the wide upturned part of the slot 37 at the right-hand side of the level 26, in which position of the pin 35 the blocking member 7 could be turned upwards if the locking member 24 and the catch 28 were not provided.
In order to prevent an article to be franked of a particular thickness being withdrawn from the machine during this phase of the operation of the franking machine with the purpose of manipulating a thinner postage article into the gap existing between the plate 10 and the blocking member 7, spring 22 and 32 are so arranged that they immediately close this gap if the postage article is withdrawn. The spring 32 swings the blocking member 7 again so that it projects below the stamping surface 3 and the spring 22 adjusts the pressure plate lever 21 into its initial position relative to the control lever 19. As soon as the lever 21 has reached this position, the member 24 is raised by the abutment pin 31 against the action of the tension spring 29 and on swinging of the blocking member 7 into its initial position prevents a clamping action by the catch 28.
It should be clearly understood that the embodiment described and illustrated is given by way of example and that many modifications. additions and omissions are possible without departing from the scope and spirit of this invention.
1. In a franking machine which comprises a value stamp, a support member for supporting an article to be tranked, a blocking member movable into a blocking position in which said blocking member prevents franking by said value stamp, means for inking said value stamp, said inking means being normally disposed in a rest position in which said inking means prevent access to said value stamp, first displacement means for displacing said inking means from said rest position to ink said value stamp, means for moving said blocking member into said blocking position after inking of said value stamp, second displacement means for moving said support member towards said value stamp, means resiliently connecting said support member to said second displacement means, and common drive transmitting means for operating said first and second displacement means, the combination of means for locking said blocking member in said blocking position, means for linking said blocking member to said support member for jointly moving said support member and said blocking member, a double-armed lever carrying said blocking member on one arm thereof, spring means acting on the other arm of said double-armed lever for urging said blocking member towards said blocking position, and lever means carrying said support member, said locking means comprising catch means connected to said other arm of said doubleaarmed lever, a locking member connected to said lever means, and a toothing on said locking member, said catch means being engageable in said toothing for rigidly retaining said blocking member in a predetermined position relative to said support member.
2. The combination defined in claim 1, and further comprising an abutment normally bearing against an inclined surface of said locking member, and a further abutment for bearing against said catc h means to prevent said catch means from engaging said toothing, movement of said support member towards said value stamp disengaging said locking member and said catch means from the respective said abutments, and moving said catch means into engagement with said toothing after said abutments have been disengaged so as to rigidly connect said blocking member to said support member for joint movement.
References Cited UNITED STATES PATENTS 2,344,609 3/1944 Hanson 101297 2,350,853 6/1944 Wheeler et a1. 1,962,729 6/1934 Andrews l01-79 X ROBERT E. PULFREY, Primary Examiner.
F. A. WINANS, Assistant Examiner.