[0001] In the field of the obliterators used in the parking areas or on public means or
to obliterate tickets or similar are known machines in which, by inserting the ticket
in the slot machine, the sensors placed inside the machine start an electric motor.
This electric motor puts in rotation rubber rollers for the taking and the moving
of the introduced ticket, so to lead it to the printing roller of the thermal head.
Coming to the roll of the thermal head, recognized and placed under the same, the
introduced ticket is obliterated. Following the ticket is brought in exit from the
obliterator by the electric motor and by the same rollers which have moved it to the
thermal head. The electric motor and the rollers used to take and move the ticket
to the printing head and to bring it in exit have costs that weigh onto the total
cost of the obliterator. Moreover, the system to move the ticket with rollers is often
cause of jamming of the obliterator. The invention consists of a new obliterator,
able to avoid the above cited drawbacks, arranges without electric motor for ticket
moving and moving rollers of the ticket inside the obliterator. The invented obliterator,
instead of motor of dragging of the ticket and rollers, is equipped with an encoder
applied to the printing roller. In the invented obliterator the ticket is manually
inserted inside the machine until the mechanical end of stroke. At this step a sensor
starts the printing device, lowering the printing head onto the ticket and causing
a mechanical vibration on the ticket perceivable to the user and a sound signal. At
the beginning of the manual pulling out of the ticket, the encoder, placed onto the
printing roller, starts and synchronizes the printing with the dragging speed of the
ticket. At the complete pulling out of the ticket, other sensors, placed at the slot
entrance of the ticket, give the signal for the lifting of the head, put the machine
ready for a new obliteration. The moving steps of the ticket inside the machine are
consequently manual with the encoder that starts and synchronizes the printing when
begins the pulling out of the ticket. So it is obtained, further to the obviously
economic advantage given to arrange a machine with less number of parts and so with
less production costs, a bigger speed of use. This permits to discharge the possible
queue in front of the obliterator more quickly in comparison with the obliterators
known in the art. Further, being not the machine equipped with rollers to bring the
ticket under the printing head and to pull out the same from the obliterator, the
invented machine is then unlikely subject to jamming. The introduced ticket, in fact,
can not be jammed between the moving rollers to the printing head as can happen in
the known obliterators. These and other advantages reach with the invented machine
are better showed to the following detailed description of a preferred embodiment
but not exclusive, together with the enclosed drawings of sheets 1, 2 and 3 that show,
in a merely indicative way, the invented obliterator. In details in sheet 1 figure
1 is perspective view of the invention. Figure 2 is perspective view of the obliterator
without the outside supporting and containment parts. In sheet 2 figure 3 is exploded
view of the main parts of the machine. In sheet 3 figure 4 is longitudinal section
view of the invented obliterator in step of no working. Figure 5 is longitudinal section
view of the invented obliterator in step of working with the ticket inserted inside
the machine. The thermal obliterator consists of an obliterator body 1 and is equipped
with sensors 2 onto the slot of ticket fitting up. Placed over the printing roller
3 is present a further sensor 4 to detect the introduced ticket. The printing roller
is axially connected with an encoder 5. Further, a thermal head 6 is present connected
to a lifting device 7 with start by a card 8. The lifting device 7 comprises an electric
motor 9 and a cam 10 acting onto an outline 11, obtained engraving central inside
part of the lifting device 7, in turn connected with elastic connection means 12 that
permit the moving in comparison with the machine structure. The outline 11 into which
runs the cam 10 during the rotation is equipped with a tooth 13. By a fastener 14
the lifting device 7 is connected to the support parts 15 of the thermal head 6. The
electric motor 9, the sensors 2 and 4, the encoder 5 and the thermal head 6 are connected
to the card 8 with electric cables and with connection in use for this mechanisms.
In working step the obliterator provides that the thermal head 6 was lifted. This
position is driven to the cam 10. Introducing the ticket to be obliterated, the sensor
4, placed near the mechanical end of stroke of the ticket, is started. The pulse generated
to the sensor 4 is received and processed to the card 8. The activation of the sensor
4, by the action of the card 8, starts the electric motor 9. The rotation of the electric
motor 9 is transmitted with known connection means to the cam 10. The rotation of
the cam 10 inside the outline 11 determines the lowering of the lifting device 7 onto
the ticket together with the thermal head 6. Going on in its moving inside the outline
11 the cam 10 meets the tooth 13. The moving discontinuity of the cam 10 determined
to the tooth 13 generates a vibration that is felt to the user of the obliterator
that keeps the ticket by a hand; in this step is also activated the sound signal.
Pulling out the ticket, the user starts the encoder 5. The electric pulse generated
to the encoder 5 reaches the card 8 that starts the thermal head 6. The encoder transforms
in electric pulses the extraction speed of the ticket and its position. These pulses
are read and processed to the card 8 that synchronizes the printing speed of the thermal
head 6 with the pulling out speed of the ticket. Completely pulled out the ticket
the sensors 2, connected to the card 8, give the electrical signal to start again
the electric motor 9. Going on in the rotation the electric motor 9 brings the cam
10 to move inside the outline 11, determining the lifting of the thermal head 6 by
the fastener 14 of the lifting device 7. The obliterator so returns in the beginning
position, ready for a new obliteration.
