DE2921836A1 - MANUAL ACTUATOR FOR A RECORDING MATERIAL FEEDER FOR A PRINTER - Google Patents

Description

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ΒΚ.-Ή «. FRANZ 'WUESTHOFF

PATENTANWÄLTE _DR ^ _freda ^ _{mmgF (l} ^ _x , _fi)

WUESTHOFF - v. PECHMANN - BEHRENS - GOETZ _D , p _L .- _mG . _GE rha _RD puls

DIPL-CHEM-BR-E ₁ FREIHERRVONPECHMaNN PROFESSIONAL REPRESENTATIVES BEFORE THE EUROPEAN PATENT OFFICE DR.-ING. DRETER BEHRENS

ESSIONAL REPS T P DR.ING. DRETER BEHRENS MANDATAIRES AGREES PRES l'oFFICE EUROPEEN DES BREVJEr ^ I £ J Q 3 ^ PL-ING-; DIPL.-TIRTSCH.-ING.KUPERT GOETZ

D-8000 MUNICH SCHWEIGERSTRASSE

phone: (089) 66 20 ji telegram: protectpatent Telex: 524070

1 / 4-52 257

Applicant: C. Itoh Electronics, Inc.

Beethoven Street
Los Angeles, California 90066, USA

Title: Manual actuator

for a recording material feeding device a printer

909883/0623

ORIGINAL INSPECTED

PATENT LAWYERS

WUESTHOFF - ν. PECHMANN - BEHRENS - GOETZ

PROFESSIONAL REPRESENTATIVES BEFORE THE EUROPEAN PATENT OFFICE MANDATAIRES AGREES PRES!. 'OFFICE EUROPEEN DES BREVETS

DR. JW3. FRANZ VUESTHOFF DR. PHIL. FREDA WUESTHOFF DIPL.-ING. GERHARD PULS (19J2-I971) DIPL.-CHEM. DR. E. BARBER OF FECHMANN DR.-ING. DIETER BEHRENS DIPL.-ING .; DIPL.-TTIRTSCH.-ING. RUPERT G0ET2

D-8000 MUNICH SCHWEIGERSTRASSE

phone: (089) 66 20 j ι

TELEGRAM: PROTECT PATENT

telex: j24 070

1 -52 257

description

Manual actuator

for
a recording material feeding device of a printer

The invention relates to a manual operating device for a recording material feeding device for Printer.

US Pat. No. 3,986,594 discloses a mechanical or impact serial printer known with a dot matrix print head, which is specifically for use in a computing or Adding machine is suitable and is characterized by the fact that to move the writing head forward along the paper, for advancing the paper between prints and for selectively advancing the ribbon between an unwinding one and a winding ribbon reel a common drive is used. It is an improved paper feed device has been developed, which works in close correlation with the drive member for the write head, a simplified and cheap printer with

909883/0623

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to create a relatively higher working speed. The unwinding and rewinding ribbon spools are designed in this way and arranged that they can be exchanged and driven directly by a coil engagement member arranged on the write head are to advance the ribbon in direct response to the advancement of the writing head.

Paper feed rollers, which include a platen and a pressure roller, are parallel at a short distance arranged to the cylindrical drive member for the writing head, wherein one of the rollers by a drive pawl, the is arranged eccentrically on the write head drive, is driven step by step, whereby at the end of each writing game of the write head the recording material is indexed. The drive pawl selectively engages a ratchet wheel on one of the paper feed rollers to overcome a lock which is in releasable engagement with one of the Paper feed rollers are used to keep the recording material in position during the printing or writing process to fix securely. In turn, both the lock and the paper feed rollers can be unlocked by hand so that the recording material can be positioned or aligned manually. The recording material, that is Paper, moves between the paper feed rollers along a resilient guide track, which is designed so that it guides the paper between the rollers exactly and in an upright position during the printing process Position securely supported.

For indexing or rotating the platen, a ratchet wheel is non-rotatably connected to one of the rollers Shift teeth on the outer surface in the path of movement of a Drive ratchet arm are arranged. The drive pawl arm is one with a circular end at one end Eccentric sleeve rotatably mounted at the end of the drive arm and extends from this approximately horizontally to the rear » From the side surface of the arm protrudes sideways outwards

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Pin out, which engages in a slot in the frame side part, and the arm ends in a latch or trap, which is selectively engageable with one of the shift teeth on the gear. If the free end or the latch of the arm follows the rotation of the opposite end around the eccentric, it describes an approximately oval Path of movement for engaging and disengaging one of the ratchet teeth, and “that movement turns into an almost linear movement of the pin sliding in the angled, approximately V-shaped slot. Movement in the depicted and described causes the pawl to pivot upwardly into engagement with one of the teeth to advance or advance the paper by one line or one line spacing, turn the platen clockwise spin by a limited amount. Thereafter, and in response to the rotation of the drive pawl, the will pivot Click down to return to its original position.

When indexing the platen as a result of the interaction between the "pawl and the ratchet wheel overcomes the pawl arm has the retention action of a locking member that has an inner arm portion with a downwardly directed Finger, a nose facing opposite to the finger and an outer distal end portion. Is on the arm A handle is attached via a common approach. The approach has flattened surfaces so that it can through a keyhole-shaped slot in the rear lower end of the frame can be inserted. The slot is on its inner closed end an enlarged circular section, so that the approach by bringing into register of the flattened surfaces with the open slot entrance can be inserted until it reaches the enlarged circular portion where it is blocked in the slot while he can make a limited rotation. The locking member is oriented in the slot so that the finger down into the Interspace protrudes while the oppositely directed

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Nose or pawl extends up to fit into one of the grooves to intervene in the outer peripheral surface of a circular Locking element are formed, which is arranged on the end of the platen facing away from the ratchet wheel. The finger is wrapped in a coil spring that is supported on the bottom of the gap in order to bias the locking arm yielding in a direction in which the pawl or nose is forced into one of the grooves. The handle protrudes up on the outside of the frame and something forward and has a cranked section that is provided with a knurled end surface that can be manually grasped outside of the printer housing.

By manually depressing the handle, the pinger overcomes the pretension of the spring and triggers the locking tab the engagement with the groove. At the same time, the finger contact surface rests against one of the attachments of the support block to cause the pressure roller to be removed from the friction roller surface away, is moved downwards, reducing if necessary the paper can be aligned manually. When you let go of the handle, the locking lug takes effect the spring preload on the finger automatically into a Position of engagement with the locking member back and the pressure roller rests against the platen again. In In this context, the drive pawl must overcome the locking arm when the platen is indexed. Consequently is the distance between the grooves on the locking element so that when the drive pawl is released from the ratchet wheel, the locking lug penetrates into the next groove on the locking element, to advance the paper exactly to a predetermined writing line spacing. With the reduced in diameter At the end of the platen a platen knob or a hand wheel is non-rotatably connected to rotate the platen and index the paper manually.

U.S. Patent No. 3,787,884 discloses both manual and automatic paper feeding devices in which

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U.S. Patent 3,878,886 discloses an automatic paper feed device.

US Pat. No. 4,070,963 discloses a paper feeding device known that has a role that is mechanically connected to a ratchet wheel, a pawl and a pawl stop, which are arranged so that the ratchet turns neither in one nor in the other direction. Furthermore, the Device for disengaging an electromagnet the pawl with the ratchet and a tension spring that turns the released ratchet.

The invention is based on the object of a simple manual operating device for the recording material feeding device of a printer that connects to the core of the solenoid of the feeder is mechanically connectable and yet does not interfere with its normal functioning.

The solution to this problem is characterized in the appended claims.

The invention is applicable to a printer having a frame, a writing head mechanically connected to this and a platen mechanically connected to the frame so as to be between it and the write head a recording material can run off. The printer also has a pair of mandrel wheels that hold the recording material able to support and are mechanically connected to the frame via a mandrel wheel shaft. The recording material feeding device has a ratchet wheel that is mechanically connected to the mandrel wheel shaft in order to obey this of an electrical signal generated by the printer to issue, whereby the recording material is moved step by step. To the recording material— The feed device also includes a plate which is mechanically connected to the side wall of the frame the plate mechanically connected electromagnet with a

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Coil core, a pawl that connects to the coil core of the electromagnet mechanically, connected and arranged so that they mechanically engage the teeth of the ^ ratchet wheel able to give this rotary motion., and a spring, which mechanically connects the pawl to the plate. Exe manual operating device for the recording material feed device according to the invention has a lever arm that connects to the coil core of the electromagnet is mechanically connected and is able to release the pawl from engagement with a tooth of the ratchet wheel.

An exemplary embodiment of the invention is explained in more detail below with the aid of schematic drawings. It shows:

Fig. 1 is an oblique view of a printer with a frame, a writing head and a platen, with its recording material feeding device a manual operating device according to the invention can be used,

Figure 2 is a side view of the manual actuator for the recording material feed device of the same printer in one first position,

3 is a side view similar to FIG. 2 of the same manual operating device in one second position,

Fig. 4 'shows a cross section through the same manual operating device in the second position and

FIG. 5 is a partial side view of the printer according to FIG. 1 with the manual operating device.

For a better understanding of the 'invention it is first necessary to see the description of a printer below which the invention is applicable "to be read in conjunction with the accompanying drawings. According to Fig", 1 has a

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no

Printer 10 has a frame 11 with a pair of side panels 12 and a writing head 13 which can move laterally over the front part of the frame 11. The write head 13 is of the type described in US Pat 4 004 671 is described. Similar print heads are in U.S. Patents 4,070,963, 3,986,594 and 4,062,436. Furthermore, the printer 10 has an inking unit 14 that is connected to the Writing head 13 is mechanically connected to provide printing ink for printing on a recording material, as well a control shaft 15, which on the frame 11 between the two Side plates 12 are rotatably mounted and mechanically connected to the writing head 13 and the inking unit 14 to them to move together over the front part of the frame 11 away. The recording material can be paper its edges TransportIb "rather with a standardized spacing between them are trained. The printer 10 also includes two mandrel wheels 16, each of which is disk-shaped and has a plurality of spikes 17 on its cylindrical side wall with the same spacing as the Transport holes of the recording paper are arranged, and a disc-shaped hub 18. The printer 10 further has a mandrel wheel shaft 19 on the frame 11 between the two Side plates 12 is rotatably mounted and the two mandrel wheels 16 arranged close to the associated side wall 12 mechanically connects to one another, as well as a guide 20 for the recording material, which with the disk-shaped Hub 18 of the mandrel wheel 16 is mechanically connected so that the recording material between it and the cylindrical Side wall of the mandrel wheel 16 is arranged.

The inking unit 14 shown in Fig. 1 is similar to that disclosed in US Pat. No. 3,986,594.

A recording material feed device shown in FIG. 2 in conjunction with FIG. 5, which is able to give the mandrel wheels 16 mechanically connected to the mandrel wheel shaft 19, a rotary motion, is that in US Pat. No. 4,070

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described similarly. The device has an adjustment plate 60 which is mechanically connected to one of the side plates 12 is connected, a ratchet wheel 61 which is mechanically connected to the mandrel wheel shaft 19, a pawl 62 which is in the ratchet wheel 61 engages and with the end of a bobbin 63 of a recording material feeding electromagnet 64 is pivotally connected, and a spring 65, which the adjustment plate 60 with the pawl 62 at a connection point 66 mechanically connects. The location of the connection point 66 is chosen so that the line of force of the spring 65 runs slightly below the pivot axis 67 of the pawl 62, so that a single spring 65 is sufficient to both the pawl 62 to advance when the coil core 63 is released and to apply a clockwise force to the pawl 62, whereby the pawl 62 is held in engagement with the ratchet wheel 61 and in contact with a pawl stop 68 will. With each current pulse that the feed solenoid receives, it turns the ratchet wheel 61 by one step and causes in that the mandrel wheel 16 and the recording material Advance by an amount equal to the distance between the teeth of the ratchet 61 and the diameter ratio between the mandrel wheel 16 and the ratchet wheel 61 corresponds. The current pulses are fed to the feed solenoid 64 automatically fed as part of the print game.

Referring to Fig. 2 in conjunction with Fig. 4, the recording material feeding device also includes a manual actuator that includes a lever arm 70 that is connected to the Coil core 63 of the feed solenoid 64 is pivotally connected. A slot 71 is made in the side plate 12 incorporated through which the lever arm 70 can protrude and which enables the lever arm 70 to move backwards so that the bobbin 63 moves backwards, to bring the pawl 62 out of engagement with the teeth of the ratchet wheel 61. A pin 72 that supports the bobbin 63 connects to the lever arm 70, penetrates a hole in the pawl 62 with play, so that when the coil core 63 by the feed solenoid 64 or manually from

52

User is actuated by pressing the lever arm 70, the pawl 62 in the by the spring 65 and the pawl stop 68 can pivot in a certain way.

In another embodiment, the lever arm 70 can with the mandrel wheel shaft 19 can be pivotally connected or replaced by a button that works in the same way as the lever arm 70 is mechanically coupled to the coil core 63 and loosely connected to the pawl 62. Using the Button instead of the lever arm 70 has the additional advantage that the user, while he is the writing line on the recording material with one hand, move the recording material forward incrementally by hand can. The lever arm 70 also offers advantages as a release member for removing the recording material the printer 10. The rotary movement of the drive device is unidirectional.

From FIG. 3 in conjunction with FIG. 2 it can be seen that the lever arm 70 has been pulled backwards together with the coil core 63 of the feed electromagnet 64 and has thereby pulled the pawl 62 out of the teeth of the ratchet wheel 61. The spring 65 pulls the pawl 62 upwards into a tooth space of the ratchet wheel 61 which is closer to the spool core 63 than the tooth space in which the pawl 62 had previously engaged, which, when the user releases the lever arm 70, causes the pawl 62 retreating under the action of the spring 65 rotates the ratchet wheel 61.

In conjunction with FIG. 2, FIG. 4 shows the pin 72 which connects the lever arm 70 to the coil core 63.

From Fig. 5 in conjunction with Figs. 2 and 3 it can be seen that the recording material feed solenoid 64, the spring 65 and the pawl stop 68 are attached to the setting plate 60. The pawl 62 is connected to the

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Coil core 63 of the feed electromagnet 64 mechanically coupled and via the spring 65 also with the teeth of the Ratchet wheel 61 coupled elastically. The movement of the pawl 62 is directed to one side by the pawl stop 68. The feed solenoid 64 is by an electric Pulse actuates and moves the plunger 63 rearward, causing the pawl 62 out of engagement with a Tooth of the ratchet wheel 61 is released. The spring 65 pulls the rearwardly moved pawl 62 upwards into the preceding one Tooth gap of the ratchet wheel 61 and forward, so that the pawl 62 on the preceding tooth of the ratchet wheel 61 applies and rotates the latter clockwise to advance the recording material by one step. The recording material feeding device after the Invention not only includes that of US Pat. No. 4,070,963 known indexing mechanism, but also the manual feed actuator. How the The manual feed actuator includes manually moving the spool core 63 of the recording material feed electromagnet 64 and the pawl 62 by the lever arm 70 from their first to their second position and from the latter back to its first position (see Fig. and 3)

When the user pushes the lever arm 70 or button into the 3 has spent right end position, the pawl 62 of the tooth of the ratchet wheel 61, with the If there has been any intervention, loosen it, which allows the ratchet wheel to rotate freely. The pawl stop 68 therefore does not call Blockage of the mechanism resulted in counterclockwise rotation of the pawl 62 due to the action of the Teeth of the ratchet wheel 61 would prevent the front end of the pawl. By pushing the button or the lever arm 70 is disengaged by the The pawl 62 with the teeth of the indexing wheel 61 releases the recording material with respect to the printer 10.

909833/0623

Claims (3)

DR -INO. FRANZ-WUESTHOFF PATENTANWÄLTE dr. ph, l.freda wuesthoff (^ WUESTHOFF-v. PECHMANN-BEHRENS-GOETZ dipping, gerhard puls (1952-1971) DIPL.-CHEM. DR. E. BARON OF PECHMANN PROFESSIONAL REPRESENTATIVES BEFORE THE EUROPEAN PATENT OFFICE DR.-ING. DIETER BEHRENS MANDATAiRES agre £ s pres l'office european des brevets dipl.-ing .; dipl.-tpirtsch.-ing.Rupert goetz 2921836 D-8000 MUNICH 90 SCHWEIGERSTRASSE 2 phone: (089) 66 20 51 telegram: protectpatent telex: 524070 1 -52 257 CLAIMS 1.] Manual operating device for a recording material pre-slide device a printer (10), which has a frame (11), one mechanically connected to this Writing head (13), a platen that is connected to the frame (11) is mechanically connected so that a recording material run between the writing head (13) and the platen can, and has a support for the recording material mechanically connected to the frame (11), characterized by - A ratchet wheel (61) which is mechanically connected to the base (mandrel wheel 16) so that it can rotate issued to the recording material in response to an electrical signal generated by the printer (10) to move, - a plate (adjustment plate 60) which is mechanically connected to a side wall (12) of the frame (11), - an electromagnet (64) which receives said electrical signal from the printer (10) and on the surface the plate (60) is arranged and mechanically connected to it, - A pawl (62) that connects to the coil core (63) of the electromagnet (64) is mechanically connected and arranged so that they mechanically engage the teeth of the ratchet wheel (61) able to give it a turning motion, / 2 909883/0 623 - 2 - 52 - A spring (65) which mechanically connects the pawl (62) to the plate (60), and through - A lever arm (70) which is mechanically connected to the coil core (63) of the electromagnet (64) and which The pawl (62) can be released from engagement with a tooth of the switching wheel (61). 2. Apparatus according to claim 1, characterized in that the lever arm (70) by a button is replaced, which protrudes from a slot (71) and can be pivoted with the pawl (62) and with the coil core (63) of the electromagnet (64) is rigidly connected. 3. Apparatus according to claim 2, characterized in that the button close to the side wall (12) of the frame (11) is arranged to one-handed To create actuatable feed and release device. 909883/0623