[0001] In the field of the roller printers with print of vouchers and tickets are known
opening shutters placed onto the slots from which the paper goes out toward the user.
These opening shutters are driven by means of an electromechanical device that, when
necessary, opens the printer shutter from which the voucher or the printed ticket
goes out, to be taken. Said shutters have the aim to avoid that vandal acts, like
the introduction of different materials or objects inside the printer slot from which
the vouchers or similar coming out, prevent the coming out of said vouchers in sequence
and so to prevent the correct working of the printer. In the known art the devices
to print vouchers with roller printers consists of a cutting device place downstream
of the printing head. In presence of a printer to be placed in public places or for
automatic working, where the user directly provides to take the voucher or the ticket,
said printer is equipped with two specific and different devices: a device for the
cutting of the voucher or the ticket to the paper roll after that the printing is
made and a second shutter device that, in opening, permits the getting out of the
printed voucher, preventing the introduction of foreign matters inside the printer.
The shutter device is to be opened only to permit the getting out of the voucher or
the ticket and it comes to immediately close by means of automatisms and electric
motor that drives its working and they permit the opening and the closing of the shutter
in the scheduled times for the working. It is obviously that, to have a cutting device
and a opening/closing shutter device creates high manufacturing industrial costs,
so as high are the costs determined to the working management of the two devices used
in the present art. Moreover, the paper blocks up along the shutter way can put out
of order the roller printer with increase of the maintenance costs for the reset.
Besides, the complexity of the known printers with two different devices determines
a bigger possibility of breakdowns or jamming of one of the two devices with consequent
impossibility of working of the automating device for printing tickets. Object of
the present invention is a shutter for automatic printers, driven by an electric motor,
to be opened for permitting the ticket getting out and with a blade integrated in
the same shutter. In this way, following to the ticket getting out from the automatic
printer, the shutter comes to close again and it is able to cut the final part of
the paper onto which the ticked is printed. To realize a scissors cut, other to the
shutter with blade is present a counter-blade, mounted onto the frame of the printer,
in such a way that the ticket in passing onto the two blades is cut. With the cutting
device integrated into the shutter a minor manufacturing cost and a minor complexity
of the automatic printer are determined, integrating in a sole device the cutting
and the opening/closing steps. The invented device, moreover, permits energetic saving
in the working of the same printer. Others aims and advantages of the invention are
better pointed out to the following description of a preferred but not exclusive embodiment,
together with the drawings of the sheets 1, 2 and 3 showing an indicative but not
limiting version. In particular in sheet 1 figure 1 is transversal section view of
part of the roller printer with blade closing shutter. In sheet 2 figure 2 is frontal
view of the shutter provided with upper blade. In sheet 3 figure 3 is perspective
view of an application form of the blade shutter mounted onto an automatic printer
for printing tickets. The blade closing shutter for roller printer consists of an
electric motor 1 with connections to the check and on/off card with a shaft 2 connected
to an eccentric cam 3 having a pin 4. The pin 4 is inserted into a hole 5 of a shutter
6, with this shutter 6 having an upper placed blade 7 with cutting edge along the
direction way of the shutter. In counterposed position to the blade 7, fixed onto
the frame of the roller printer, is present an immovable blade 8 with cutting edge
placed on vertical plane not coinciding with the plane of the blade 7. Said blades
7 and 8 with counterposed cutting edges onto staggered planes are positioned near
a slot 9 of getting out of the printing ticket, with sizes of the slot 9 such to permit
the getting out of the printed ticket but not having a space to introduce the fingers
inside it. Near the immovable blade 8, along the inside wall, is present a body 10
suitable to house the shutter 6 with the blade 7. Said body 10 drives the shutter
6 with the blade 7 and it forms an anti-breaking support structure when the shutter
6 with the blade 7 is kept inside the sliding seat by a spring 11, placed between
the inside part of the shutter 6 and part of the printer frame. Moreover, a suitable
passage 12 is present, inside which the ticket, coming to the paper roll 13, pulled
to paper drawing roll and printed to the printing head 14, arrives to the opening/closing
shutter 6. In working step the normal advancing of the paper coming to the paper roll
13 by means of the paper drawing roll with print by the head 14 is actuated. The printed
paper passes inside the suitable passage 12. At the getting out of the printed paper
to passage 12 the control and start devices drive the rotation of the electric motor
1. The rotation of the shaft 2 of the electric motor 1, connected with the eccentric
cam 3 by means of the pin 4, transmits the motion to the shutter 6. Said shutter in
closing position during the non use step, i.e. in upper position inside the body 10,
lowers, following of the rotation given to the electric motor 1 and with times and
ways provided to the control device which drives the electric motor 1. Following to
the rotation of the shaft 2 the eccentric cam 3 reaches the position in where the
pin 4 is in the lower point, permitting to the paper to get out from the passage 12.
At the end of the printed ticket getting out, in the times and ways provided to the
control and starting devices of the electric motor 1, the rotation of the shaft 2
is completed put again the shutter 6 in the upper position. During the ascent step
the blade 7, helped in the cutting work to the immovable blade 8, cuts the paper in
the end part with the print. After to have actuated the cutting of the paper, the
shutter 6 with the blade 7 is in upper position closing the slot 9 from which is got
out the printed ticked to be put to the user. The closing arranged to the shutter
6 with blade 7, so, other to actuate the cutting of the printed paper coming the paper
roll 13, prevents that dust, dirty of other can go into the inside part of the printer
damaging the head, the paper or other parts inside the printer. The invented device
is possible of changing and modifications all entering in the present inventive step.
Moreover, all the technical details are to be changed with equivalent others.
