Ink jet printer

[Detailed Description of the Invention]

(b) Field of the Invention The present invention relates to the ink-jet printer which makes a minute ink droplet inject. (Ro) Conventional technology This kind fundamental to Drawing 1 of device is shown. A cylinder drum (1) carries out the solid coiling time of record Paper 2 to the surface, and is supporting it on it, and the guidance lever (3) is arranged at these cylinder drum and axial parallel. A guidance lever (3) is by what constructs across an arm (4) slidably. an arm (4) makes the shape of an arch prolonged in the drum surface and parallel for surroundings of cylinder drum To 1 5 -- the inside -- the -- the [ 1~] -- arrangement adherence of the ink injection type head (5a) (5d) ~ of four is carried out dispersively. the [ these ] -- the [ 1~] -- four -- Rad(5a) (5d> Ha -- being able to inject magenta, cyanogen, yellow, and each blank ink, respectively, therefore considering rotation of a cylinder drum (1) as the main scan, and considering movement of an arm (4) as a subscan) ~ embracing a record drawing signal -- the -- 1~the 4 -- a color picture is suitably printed by the record paper (2) by jet To 7 To in ink from A head (5a)~<5d. The structure of each above-mentioned ink head <5a~ (5d) is shown in Drawing 2. The head itself to refuse is common knowledge and it explains the structure and operation briefly below. If it changes according to a piezo-electric vibration body (1o) or a record signal and pressure is impressed by the pressure propagation medium (12) in a phon room (11), the thin board (13) provided in the phon room opening will project to the ink chamber (14) side which touches it. In an ink chamber (14), it is ink introduction vibes (always filled in A/Ri (25) through 15>). Therefore, the ink ahead of [ the ] projection projects from the 1st orifice (16) by projection of a thin board (13), and, subsequently it is on 1st orifice Over 6 and the same axle (it does not jump out as an ink droplet (18) from the 2nd orifice (17) of To have.). Feeding Be trimmed air gathers in the center from air introduction vibes (19) in the air room (20) provided between the 1st orifice (16) and the 2nd orifice (17), By spouting from the orifice (17) of following Ichiba 2, the high-speed air style is formed, therefore an ink droplet (18) is helped by this flow and has sufficient flight speed required for high-speed printing. by the way, if it is in an ink Shetto printer, it comes out and is easy to carry out raw [ of the clog ] to]/Ri at the time of the orifice of - throat, and a non-printing action. It was considered as the effective method of preventing this, and The and the invention of Japanese Patent Application No. No. 112727 [ 56 to ] were made. At the time of a non-printing action, this method sticks a pad to the front (21) of the ink head of Drawing 2, and shuts 2nd Oli Fiske 17, and an outline gap is To, It is in a state which opened an air introduction pipe (19) wide, and from ink introduction vibes (15), high-pressure introduction of the ink is carried out, and an air room (20) is filled with ink. A clog of an orifice is A(ed) Prevention 1, without ink 2nd near an orifice (17) drying by this. To be which is not when S-Re feeds air again from an air introduction pipe (19), although ink must be discharged and it must be than an air room (20) at the time of a printing start. The ink of an air room (20) is pressurized from that direction of the perimeter at Immediately and this time, and it is Be able to get out from the 2nd main orifice (17). With reference to Drawing 1, an arm (4) stops again to hoe 18 Bon-young at the left end of a guidance lever (3) at the time of a non-printing action. In bow Mu Bong Young, when filling up an air room (20) with ink like J- and an account, it operates. - The closing mechanism (6) to carry out is Establishment (J Being done.). Switching device 6 has the piece (7) and (8) of the 1st and 2nd support which forms an approximate arch cooperatively, and is the 1st and 2nd A head (the 1st and 3 - which counters 5a> (5b)) near the top part of the piece of the 1st support (7). the 2nd A pad (9a) (9b) -- it has the 3rd and 4th The / Do (9c) (9d) which counters the 3rd and 4th A head (5c) (5d) near the top part of the piece of the 2nd support (8), respectively. If an arm (4) is located in a home position by the end of a printing action, first -- the piece (7) and (8) of the 1st and 2nd support rotates outside mutually centering on each lower end -- thereby -- the -- the [ of respectively correspondence of the 1~4th A pad ~ (9a) (9d) ] -- shutting the orifice of the 1~4th A head ~ (5a) (5d) -- To. Then, ink restoration to an air room (20) is performed like the above. 7 (8) reverse-rotates to an inner side, each The and 7 Do separate from the orifice of - throat to each, and it is located on the king before a printing action, and piece of the 1st and 2nd support <the gutter whose arm (4) is subsequently an unnecessary ink recovery means (30). In this position, IJF A appearance of the ink is carried out from the air room (20) of each head, and capture collection of the discharged ink is carried out at a gutter (30). Then, an arm (4) carries out both-way passage of the cleaning position of power Qu's (30) flank, and, subsequently moves to the prescribed position on a record paper (2). A plurality of cleaning members [ position / above-mentioned / cleaning ] (31) (34-) 1) ... is set up, these members wipe away the front (21) of each head which carries out contact passage with them, and it removes Adhesion To, Inc. to this field. Thus, an ink-jet printer is although the clog which had become a problem from the former by having a clog preventive mechanism can be conquered, Some ink with which it filled up in the air room (20) is not discharged by the gutter (30), but it invades in an ink chamber (14), Early printing was making the fault which becomes unstable newly produce, as a result of ink's remaining slightly on the air room (20) wall surface the 1st-2nd orifice (16) and near (17). Then, the method of solving the new fault to refuse by making several test printing perform in advance of picture printing is tried. However, according to this test printing, by the time printing is stabilized, it is a record paper (winding operation to the cylinder drum (1) of 2>). It had to be carried out by having repeated the printing action which makes 1 cycle injection operation of an ink droplet (18), and delivery operation of record paper <2 several times, and the standby time to a printing start became long, and the record paper (2) was consumed vainly. C) The object of an invention the present invention aims at Prevention 1 Into of a waste of shortening of the standby time to a printing start, and a record paper (2) in the in Kunuet l~printer provided with this Clogging prevention top mechanism -- a sake -- calling -- having . (D) Constitution of an invention [] The present invention in Cuche'71~printer provided with the Prevention top mechanism from Packed, after being closed Vitamin appearance 7 toward an unnecessary ink recovery means in advance of Restoration, Inc. which had prevented the eye glji ball, or a printing action, toward the unnecessary ink recovery means, from the 1st Orif C A, compulsorily, it can blow off and closes ink -- Tough composition is carried out. (Ho EXAMPLE Exchangeable ink cart rerun which supplies ink to ink head (5a) (5d) ~ which Drawing 3 showed the important section of the present invention ink-jet printer, and described (40) minutely to Drawing 2 via ink introduction vibes (15), The air pump with which (41) feeds an air style in the air room (20) of the above-mentioned ink head (5a) (5d) ~, The 1st electromagnetic valve Allocation(ed) by the 1st air introduction vibes (19) with which (42) contracts an air room (20) with the air pump (41), The 2nd electromagnetic valve with which (43) was Allocation(ed) by the 2nd air introduction pipe (44) which connects ink car 1 Heli Turn (40) to the above-mentioned air pump (41), and <45 are the 3rd electromagnetic valve that opens the air introduction vibes (19) of account 1st of ■- only at the time of air room (20) inner and \ ink restoration operation. the clog which it Therefore, ink restoration is performed to an air room (20) at a home position as for ink head (5a) (5d) ~ as shown in Drawing 4, and makes dryness of 1st" Refuse (16) the main factor -- prevention Beautiful. In this state, pads ~ of this and Made which carried out the number type of one a flat head (46) and the leg (47) which stood erect from that center (9d) (9a) It is close with the orifice side of ink head (5a) (5d) ~ by energization by the side of the head of the piece of support (7), and (8), and is closed-A room(ing) the 2nd orifice <17 fluid-tight. The arm on which A> Quart (5a) (5d) ~ by which ink restoration was performed to the air room (20) is supporting the head (in advance of a printing action, a gutter (37-0) is countered by movement of 4>, and as shown in Drawing 5, the above-mentioned restoration ink (25') is discharged from the 2nd orifice (17).) Like the timing chart of the 6th division, this discharge operation opens the 1st electromagnetic valve (42) to timing T1, and is an air pump (carried out by making 41> operate.). Namely, the thing for which a formation It was air style is added to the air room (20) of ink head (5a) (5d) ~ via the 1st air introduction vibes (19) with an air pump (41), and restoration ink (25') is pressurized from the circumference, Discharge Cut off recovery of the above-mentioned restoration ink (25') is carried out toward a gutter (30) from the 2nd orifice (17) in an opened condition. The 1st electromagnetic valve (42) is bolted that the restoration ink (25') which flowed backwards in the ink chamber (14) via the 1st Oris (16) to timing T2 after the end of discharge operation by discharge operation to refuse should be discharged, and it is To, 2nd 'rl Magnetic valve (43) is opened and an air pump (41) and an ink cartridge (40) are made to open for free passage. That is, the pressure increase of the ink stored in the ink cartridge (40) is carried out by addition of an air style, and these Pressure cart eyebrows are ink introduction The 8. - The eve (15) is spread and the ink in an ink chamber (14) is pressurized. Thus, if the ink in an ink chamber (14) is pressurized, the ink and air which suited the equilibrium situation in the 1st orifice (16), and pressure balancing will collapse, ink flows out of the 1st orifice (16) into a gutter (30), and they are Ze bundle To be. This ink made to flow out is ink near [ orifice side 16 ] the 1st, and the restoration ink (25') which flowed backwards when put in another way. 1 Rank next, and open the 1st electromagnetic valve (42) to timing T3, and supply a continuation injection signal to ink head (5a) (5d) ~. this continuation injection signal carries out remains adhesion in the wall surface of an air room (20), mainly as shown in Drawing 7 -- Sports -- it is supplied in order for vibration and the air style to which restoration ink (25') is added by the wall surface to remove. Naturally, from the 1st orifice (17), an ink droplet (18) is injected compulsorily, passes the 2nd orifice <17, and is caught by the gutter (30). It ends to timing T4 and initialization to printing of ink head (5a) (5d) ~ completes this operation. Namely, an ink head (5a>~ (5d) is a cylinder drum (it moves to the printing position which counters the record paper (2) wound around 1>.) from Cutter (30) by movement of after this end of operation and an arm (4)) In the above example, it is a gutter (the outflow of compulsory ink aiming at discharge of the restoration ink (25') which mainly flowed backwards after restoration ink (25') discharge to 30>). although the ink which comprises injection of the compulsory ink droplet aiming at the removal of restoration ink (25') which what suit remains used as the air room (20) wall surface was spouted -- at least -- it is good also as composition which performs any 1 side. It puts and is EFFECT OF THE INVENTION. After making Restoration, Inc. which had prevented the clog of the 1st orifice at the time of a non-printing action for the present invention discharge toward an unnecessary ink recovery means in advance of a printing action so that clearly from the above explanation, Since it can blow off and ink is compulsorily closed from the 1st orifice toward the unnecessary ink recovery means, stabilization of ink droplet injection operation can be attained, without passing through unnecessary operation, the standby time to a printing start can be shortened, simultaneously useless consumption of a record paper can be excluded.

[Brief Description of the Drawings]

The sectional view and Drawing 6 where the perspective view showing the fundamental composition of the ink Shetto printer which requires Drawing 1 for the present invention, the sectional view in which Drawing 2 shows an example of an ink head, the block diagram in which Drawing 3 shows one example of the present invention, and Drawings 4, 5, and 7 show the present invention according to operation are a timing chart of the present invention. (5a) ~<5d [ ... A gutter, (40) / ... An ink cartridge, <41 / ... Air pump. ] ... An ink head, (16), (17) ... The 1st-2nd orifice, (20) ... An air room, (30) 11- 15 A 12- Drawing 6 ! 1st #J Hint □ 321-