WASHING AND DRYING MACHINE

Abstract: A washing and drying machine having a water tank (18A, 18B) supported on a pair of rotary shafts (43) so that the water tank (18A, 18B) can be rotated in a machine body (14, 15) for carrying out the washing, rinsing and dehydrating steps with the water tank (18A, 18B) set substantially vertical, and a drying step with the water tank (18A, 18B) set substantially horizontal, the rotary shafts (43) being provided at the diagonally opposite corner portions of the machine body (14, 15), whereby it becomes possible to increase the dimensions of the water tank (18A, 18B) to as great an extent as possible in spite of the rotatable construction thereof, to enable the space in the machine body (14, 15) to be effectively utilized.

Description: This invention relates to a washing-drying machine which can continuously carry out the steps of washing, rinsing, spinning to drying. BACKGROUND ART Conventionally, as for a washing-drying machine, the one designed as shown in Fig. 14 and Fig. 15 has been devised. That is, a water tub 2 is tiltably supported by a horizontal shaft 3 in a washing-drying machine main body 1, wherein a rotary drum 4 is rotatably supported with a rotary shaft 5 within the water tub 2. A drive switching device 6 for switching to a pulsator or to the rotary drum 4 and an electric motor 7a for driving the rotary shaft 5 are arranged at the lower part of the water tub 2. The rotary shaft 5 and the electric motor 7a are connected by a belt. In the vicinity of the end part of the horizontal shaft 3, a displacement electric motor 7b is secured to a main body 1, whereby a pinion gear 9 meshing with a worm gear 8 which is driven by the displacement electric motor 7b is secured to the horizontal shaft 3. When the worm gear 8 rotates, the pinion gear 9 is driven, whereby the horizontal shaft 3 rotates to tilt the water tub 2 around the horizontal shaft 3. At the outside of the lower part of the water tub 2, a fan 10 to be used during the drying step is connected to a duct 12 through a heater 11, and the duct 12 communicates with the interior of the water tub 2. The numeral 13 designates a water outlet. In the above-mentioned construction, the laundry is put in the water tub 2 and the machine is turned on. The washing-rinsing-spinning step is carried out in the vertical state of the water tub 2 as shown by solid lines in Fig.14 and Fig.15, and, after finishing the final spinning step, the displacement electric motor 7b, and hence the worm gear 8, drives the pinion gear 9, which tilts the water tub 2 into a horizontal posture, whereby the step proceeds to the drying one. This state is shown by the two-dot chain lines in Fig.14. During the drying step, the rotary drum 4 is rotated, and the fan 10 and the heater 11 are powered to carry out the drying step. As for the washing-drying machine of the above-mentioned design, since the horizontal shaft 3 for tilting the water tub 2 is arranged at the outside of the water tub 2 and in the front and rear direction of the main body 1, the bottom area of the main body 1 is increased; and hence in order to make the same size as a washing-drying machine of conventional ones, the size of the water tub 2 has to be decreased and thus the washable-dryable laundry amount thereof is decreased. Further, since the horizontal shaft 3 for supporting and tilting the water tub 2 is arranged at the side walls of the main body 1 and the water outlet 13 is arranged at the side wall, the orbit of the water outlet 13 during tilting of the water tub 2 becomes large, and the water tub 2 cannot have sufficient capacity in the limited space of the main body 1, thereby problematically diminishing the washing-drying laundry amount. Though an arrangement of a horizontal shaft 3 at the cornering parts of the main body 1 has been invented, there is a problem that the orbits of the upper part and the bottom part of the cylindrical water tub 2 of the said machine during the tilting of the water tub 2 interfere the side walls of the main body 1, and the capacity of the water tub 2 cannot be secured sufficiently. Further, during drying of the laundry the air for drying is heated and blown into the water tub 2, and then the humid air after having dried the laundry is directly exhausted to the outside of the machine, and there arises a problem that the interior of the room becomes wet and the moisture is condensed into water on the wall surface. Though, on the other hand, a condensation type of a laundry drying machine provided with a heat-exchanger and a circular course of the air for drying may be proposed, in case of a washing-drying machine, during the washing it is necessary to contain water in the water tub, and it has a problem of injuring the reliability by encroaching of the water in the circular course, and besides, there is a problem of greatly complicating the circular course itself. Moreover, since the machine probably carries out the drying step alone, instead of drying after the spinning step, and if the water remains in the water tub the water leaks out of the water tub and there arises since the drying is made with the water tub in horizontal state, and this makes a problem in reliability. Further, due to the capacity of the rotary drum, the dryable laundry amount is about a half of the washable-rinsable-spinable laundry amount; and the laundry amount exceeding that limit protracts the drying time, and badly forms uneven dryness and any wrinkles. Therefore, the user must judge whether he or she carries out only the washing-rinsing-spinning step or can continue until the drying step, in compliance with the laundry amount before starting the washing, and this is very inconvenient. From another prior art, as shown in the JP-A-62-022 688, already the precharacterizing features of claim 1 are known. DISCLOSURE OF THE INVENTION A first object of the present invention is to obtain a tilting device for efficiently utilizing a main body capacity. A second object is to obtain a water outlet and an overflow outlet for efficiently utilizing the main body capacity. A third object is to obtain a construction of the water tub for efficiently utilizing the main body capacity. A fourth object is to obtain a very reliable and simple construction of the drying device. A fifth object is to obtain a high reliability free of water leakage under any running condition. A sixth object is to detect the laundry amount before starting the drying step, and to properly judge whether operation until the drying step is possible, in order to convenience the user. All mentioned objects are achievable by the features of claim 1. In order to accomplish the first object, the present invention provides a pair of tilting shafts for enabling tilting of a water tub at diagonal corners of a main body, whereby the tilting shafts are positioned at corner parts of a main body, thereby maximizing the water tub and efficiently utilizing the capacity in the main body, even in the case of the tilting of the water tub. In the context of this object (and of the third object, for instance) it is of importance as well that the machine according to the invention develops the machine of the JP-A-62 022 688 further by providing that the water tube is formed into a substantially cylindrical shape having the upper and bottom parts thereof formed substantially truncated-cone. In order to accomplish the second object, the present invention provides a pair of tilting shafts at diagonal corners of a main body, arranges a water outlet so as to position it in the vicinity of corners of a main body when a water tub is tilted almost horizontally, and arranges an overflow outlet so as to position it in the vicinity of the corners of the main body when the water tub is uprighted almost vertically, whereby the orbits of the water outlet and the overflow outlet pass through the corner parts of the main body during the tilting of the water tub, thereby efficiently utilizing the main body capacity and enlarging the water tub. In order to accomplish the third object, the present invention provides a pair of tilting shafts at diagonal corners of a main body, and gives the water tub an almost cylindrical shape having the upper and bottom parts thereof formed almost truncated-cones, whereby the orbit of the water tub during the tilting can be small, thereby enlarging the water tub. In order to accomplish the fourth object, the present invention arranges a blowing-in port for introducing air for drying laundry into a water tub and an exhaust outlet of the water tub at the upper opening part thereof, whereby the water does not encroach the path of the drying air, thereby realizing reliable washing-drying machine free of electricity leakage and water leakage of a simple construction. In order to accomplish the fifth object, the present invention has a controlling device which carries out washing-rinsing-spinning step in almost vertical state of a water tub and carries out the drying step in almost horizontal state of the water tub thereby spinning the laundry before starting of the driving of the tilting device, whereby the water does not leak and can offer a high reliability even when the water remains in the water tub before the tilting. In order to accomplish the sixth object, the present invention has a laundry amount detecting means for detecting the laundry amount before the driving step and a controlling device which when detecting exceeding of laundry amount above a predetermined limit stops proceeding to the drying, whereby the user needs not judge whether he can carry out only the washing-rinsing-spinning step or can continue until the drying step in compliance with the laundry amount before starting the washing, thereby improving the conveniences greatly. BRIEF DESCRIPTION OF DRAWINGS Fig.1 is a longitudinally sectional view showing a washing-drying machine embodying the present invention in a vertical state; Fig.2 is a longitudinally sectional view showing the same in a horizontal state; Fig.3 is a perspective view partly broken away and showing the same; Fig.4 is an opened-up view showing a bottom-part of the same; Fig.5 is an enlarged sectional view showing a water tub part of the same; Fig.6 is a sectional view showing a speed-reducing device of the same; Fig.7 is an enlarged cross sectional view showing a vicinity of a tilting speed reduction gear of the same; Fig.8 is a schematic view showing a limit switch part; Fig.9 is a diagrammatic view showing a flow of a drying air; Fig.10 is a horizontal sectional view showing the washing-drying machine during the washing-rinsing-spinning step; Fig.11 is a horizontal sectional view showing the washing-drying machine during the drying step; Fig.12 is an enlarged sectional view showing a bottom part of the water tub of the washing-drying machine; Fig.13 is a flow chart showing actions of the washing-drying machine; Fig.14 is the front sectional view showing the conventional washing-drying machine; and Fig.15 is the side sectional view showing the conventional washing-drying machine. BEST MODE FOR CARRYING OUT THE INVENTION Referring to the attached drawings, an embodiment of the present invention will be explained in the following. In Fig.1 through Fig.13, numeral 14 designates a prism-like main body and numeral 15 a main body having a laundry receiving opening 16 at its central upper part. Numeral 17 designates an openable outer lid for covering the laundry receiving opening 16, and numeral 18A a water tub whose lower part is formed reversely truncated-cone so as to enlarge the water tub capacity without interfering the main body A 14 during the tilting. Numeral 18B designates a water tub whose upper part is formed truncated-cone so as to enlarge the water tub capacity without interfering the main body 14 during the tilting. The water tub 18A and the water tub 18B compose a water tub. Numeral 19 designates a watertightening seal member which is arranged at the fitting part between the water tub 18A and the water tub 18B and detail whereof is shown in Fig.5. Numeral 20 designates an openable lid arranged centrally of the upper part of the water tub 18B. Numeral 21 designates an overflow outlet which is positioned in the vicinity of a corner of the main body 14 for making the water overflow during the irrigating-rinsing, etc. Numeral 22 designates a water outlet for communicating with the overflow outlet 21 at the outside of the water tub 18A, which water outlet is arranged so as to be positioned in the vicinity of a corner of the main body 14 when the water tub is almost horizontal. Numeral 23 designates a remaining water detector which is arranged at the bottom part of the water tub 18 and consists of a pair of electrodes. The water tub 18A comprises therein a rotary drum 25 provided with water passing perforations and a balancer 24, and a pulsator 26. The pulsator 26 is fitted on a washing shaft 28 of a mechanical part 27, and the rotary drum 25 is connected to a spinning shaft 29 of the mechanical part 27. Further, the spinning shaft 29 is timely connectable to and releasable from the washing shaft 28 by the above-mentioned mechanical part 27. Numeral 30 designates an input shaft of the mechanical part 27. The input shaft 30 comprises a mechanical pulley 31 and a mechanical pulley 32. Numeral 33 designates a washing electric motor, and numeral 34 a washing pulley provided to the washing electric motor 33, and the mechanical pulley 31 is linked with the washing pulley 34 with a belt 35. As shown in Fig.6, numeral 36 designates a drying electric motor, numeral 37 a speed reduction gear consisting of a worm gear and a worm wheel which is connected with the drying electric motor 36. Numeral 38 designates a drying pulley fitted on the drying electric motor 36, and the speed reduction gear 37 is connected to the drying pulley 38 with a connectable and releasable clutch 39. Numeral 40 designates a belt for connecting the mechanical pulley 32 to the drying pulley 38. Numeral 41 designates an electric motor mount which is attached to the bottom surface of the water tub 18A and to which are secured the mechanical part 27, the washing electric motor 33 and the drying electric motor 36. Numeral 42 designates a pillar, numeral 43 a tilting shaft arranged at the pillar 42 so as to be positioned at the diagonal corner part of the main body 14. The pillar 42 is secured to the electric motor mount 41, and a unit including the electric motor mount 41, the tilting shafts 43, and the pillar 42 is called a support. Numeral 44 designates a reinforcer fitted around the outside periphery of the water tub 18A and secured to the pillar 42 at both ends thereof; and numeral 45 designates two suspensions for suspending the water tub, the support, etc. at the part of tilting shaft 43 from the main body 14. Numeral 46 designates a base which is secured to the bottom surface of the main body 14 and to which are secured a blower 47, a heat exchanger 48 for condensation, and a tilting electric motor 49 for tilting the water tub. Fig.7 shows a tilting device, wherein numeral 50 designates a tilting clutch for connecting or releasing the output shaft 51 of the tilting electric motor to or from an input shaft 53 of a tilting speed reducing device 52. The tilting speed reducing 52 is so designed that its input shaft 53 comprises a worm gear 54 which meshes a worm wheel 57 arranged on an output shaft 56 of the tilting speed reducing device so as to reduce the speed. As shown in Fig.8, a wire 58 has its end secured to a wire securing member 59 attached to the electric motor mount 41, and winds its way around a guide pulley 60 and a guide pulley 61 secured to the main body 14, so as to be wound up around a winding up pulley 55 secured to the above-mentioned output shaft 56 of the tilting speed reducing device. The above-mentioned tilting speed reducing device 52 and the winding up pulley 55 compose the tilting device. The guide pulley 60 and the guide Pulley 61 are moved by a certain distance by the tension of the wire 58, and respectively have a springs 62 and a spring 63 for returning those pulleys to the initial positions when the tension of the wire 58 disappears. Numeral 64 designates a limit switch for detecting the vertical state of the water tub which is actuated by the guide pulley 61, and numeral 65 designates a limit switch for detecting the horizontal state of the water tub. Numeral 66 designates a fan duct which forms an airflow channel from the blower 47 to the heat exchanger 48, and numeral 67 designates a heater which is arranged at the upper part of the water tub 18B and opens a blowing-in port 68 for introducing the drying air into the water tub 18B, and communicates with a discharging duct 69, a discharging duct 70, and a sliding part 71. The heater 67 communicates with the discharging duct 70 through an expandable and collapsible bellows 72. Numeral 73 designates an exhaust outlet for the drying air which is opened at the bottom surface of an inner lid 20 which is provided with a filter 74. Numeral 75 designates an intake duct communicating with an intake duct 77 through a sliding part 76; and an intake duct 77 communicates with a fan intake duct 79 through an expandable and collapsible bellows 78. By this configuration, as shown in Fig.9, a circular course of the drying air from the blower 47 to the heat exchanger 48, and into the water tub 18A and the water tub 18B is circuited. Numeral 80 designates a controlling device for controlling the washing electric motor 33, the mechanical part 27, the drying electric motor 36, the tilting electric motor 49, the heater 67, etc. Numeral 81 designates a laundry detecting means which is connected to the controlling device 80 and, in this embodiment, utilizes the change of the capacitor terminal voltage of the washing electric motor 33 caused by the laundry amount in case of the driving of the pulsator 26 by the washing electric motor 33 during the washing step. That is, the water is supplied to the lower level, and the pulsator 26 is driven when the capacitor terminal voltage of the washing electric motor 33 is measured, to judge the laundry amount. Then, the water is supplied additionally according to the laundry amount, and the washing is started. Next, actions of an embodiment will be explained. Fig.1 shows the state of the water tub during the washing-rinsing-spinning step. During the washing-rinsing step, the washing shaft 28 of the rotary drum is uprighted vertical to the installation surface of the main body A 14 when the pulsator 26, which is connected to the washing shaft 28 with the mechanical part 27, is rotated by the washing electric motor 33 in predetermined forward/backward cycles. At that time, as mentioned above, the laundry detecting means 81 judges the laundry amount. The dryable laundry amount is about a half of the washable one of the same vessel capacity; namely, if the latter is 4 kg, the former is 2 kg. Therefore, if the laundry amount is judged in excess of the predetermined limit, i.e., 2 kg, the controlling device 80 carries out only the washing-rinsing-spinning step, and then gives notice of "the washing finished" to inform the user thereof (the first through the 5th steps of Fig.13. If the user wishes to proceed and finish the drying, he or she takes away a part of the laundry and carries out the drying. If the laundry amount is less than the predetermined limit, i.e., 2 kg, the drying step succeeding the washing-rinsing-spinning step is carried out when notice of "the drying finished" is given (the 4th step, and the 6th through 9th steps of Fig,13. Though, during the washing step, the water tub is filled with water for washing, the water tub 18A has been fittingly secured to the water tub 18B with the sealing member 19, which prevents the water from leaking out, affording a very high reliability. During the spinning step, the rotary drum 25 is connected to the spinning shaft 29 with the mechanical part 27 and rotated at a high speed of about 800 rpm so as to dewater the laundry. During that time, the vibration of the rotary drum 25 is transferred to the suspensions 45 through the water tub 18A and the tilting shafts 43, to be damped there. During the washing-rinsing-spinning step, the speed reduction gear 37 is disconnected from the drying pulley 38 with the clutch 39. Hence, the rotation of the washing electric motor 33 is not transferred to the speed reduction gear 37 and the drying electric motor 36, whereby the drives of the pulsator 26 and the rotary drum 25 are not hindered. In case there is any probability that some water remains in the water tub 18A as in case of carrying out the drying only, the controlling device 80 carries out the spinning before the tilting of the water tub when the drying step is directly started. By doing this, the laundry has been dewatered when the water tub is tilted, and no water remains in the water tub, and a very high reliability free of water leakage during the tilting is afforded. Further, in case the remaining water detector 23 confirms no water remaining in the water tub 18A when proceeding to the drying step, namely when the resistance between the electrodes of the remaining water detector 23 exceeds the predetermined limit, the water tub is tilted. Hence, in case any water remains in the water tub 18, the water tub is never tilted, affording a very high reliability. The tilting is carried out by that the tilting clutch is connected, the tilting electric motor is driven, and the winding up pulley 55 secured to the output shaft 56 of the tilting speed reduction gear winds up the wire 58, whereby the water tub is gradually tilted around the tilting shafts 43. When the water tub becomes horizontal, the limit switch 65 is actuated so as to stop the tilting electric motor 49. Then the guide pulley 61 is moved by the tension of the wire 58, to release the limit switch 64. During the above-mentioned tilting, since the tilting shafts 43 are arranged at the corner parts of the main body 14, the size of the water tub can be maximized in spite of its tilting, and the capacity of the main body can be effectively utilized. Further, since the bottom part and the upper part of the water tub 18A and the water tub 18B are formed in truncated-cones, they can get rid of interference with the side walls of the main body 14, and the capacity of the main body 14 can effectively be utilized, thereby to maximize the water tub capacity. Since, as shown in Fig.11 and Fig.12, the water outlet 22 is arranged so as to be positioned at the corner part of the main body 14 in case the water tub is horizontal and the overflow outlet 21 is arranged at the corner part of the main body 14, the orbits of the water outlet 22 and the overflow outlet 21 during the tilting pass through the cornering parts of the main body 14, and the capacity of the main body 14 can be effectively utilized thereby to enlarge the water tub. Next, in the drying step, the tilting clutch 50 is released, and the blower 36 alone is driven by the tilting electric motor 49. At the same time, the drying electric motor is driven, and the speed reduction gear 37 is connected to the drying pulley 38 with the clutch 39. The rotation speed of the drying electric motor 36 is decelerated to about 60 rpm by the speed reduction gear 37, and also the torque is increased, Hence, even a small electric motor can afford a great torque, and no complicated controlling device is needed to obtain a low speed. The rotary drum 25 begins to be rotated at a predetermined speed of about 60 rpm with the belt B 40 by the drying electric motor 36, so as to roll the laundry in the rotary drum 25. The drying air heated by the heater 67 is blown into the water tub through the blowing-in port 68, to dry the laundry. Air which has become much humid after drying the laundry goes through the exhaust outlet 73 and via a lint filter 74 to the heat exchanger 48, and is dehumidified, and thereafter returns to the blower. In this way, the air dries the laundry circuiting the course for the drying air. During this time, the cooling water for water-cooling the heat exchanger is timely supplied from the city water. Since the heater 67, the blowing-in port 68 for introducing the air in the water tub, and the exhaust outlet 73 are arranged at the upper part of the water tub, no water splashes the heater 67, nor does water encroach the course for the drying air, thereby offering a reliability of high safety free of electricity leakage and water leakage; and further since the air for drying is blown in the rotary drum 25 instantaneously after being heated, it very efficiently dries the laundry. Next, when the drying step is finished, the rotary drum 25 is stopped, the tilting clutch 50 is connected and the tilting electric motor 49 reversely rotates, to unwind the wire 58 which has been wound up around the winding up pulley 65. When the water tubs 18 are uprighted vertical, the tension of the wire 58 is such reduced that the guide pulley 60 is returned to the initial position by the spring 62, to actuate the limit switch 64, which stops the tilting electric motor 49. In the above-mentioned manner, a series of steps from washing to drying is carried out. INDUSTRIAL APPLICABILITY As has been described, the present invention arranges the tilting shafts at the cornering parts of the washing machine main body, whereby it can wash a certain amount of laundry without enlarging the size of the main body of the washing machine. Further, the present invention is that a pair of tilting shafts are arranged at the diagonal corners of the main body and a water outlet is arranged in the vicinity of the corner part of the main body; and when the water tub almost horizontalized, and arranges an overflow outlet in the vicinity of the cornering part of the main body, whereby the orbits of the water outlet and the overflow outlet during the tilting pass through the cornering parts of the main body, and the capacity of the main body can be utilized efficiently and the water tub can be made large. Moreover, the present invention arranges the pair of tilting shafts at the diagonal corners of the main body, and gave the water tub almost a cylindrical shape having the upper part and bottom part thereof formed almost truncated-cone, and thereby the orbit of the water tub during the tilting is made small, and the water tub can be made large. Further, since the present invention provides a blowing-in port and an exhaust port at the upper part of the water tub, no water splashes the heater nor does water encroach the circular air course, thereby offering a reliability of high safety free of electricity leakage and water leakage. Further, the present invention has a controlling device which carries out the washing-rinsing spinning step in the almost vertical state of the water tub and carries out the drying step in the almost horizontal state of the water tub and carries out the spinning step before the driving of the tilting device, whereby even when the water remains in the water tub before the tilting the water is removed by the spinning, and no water leaks during the tilting, thereby a high reliability can be offered. Moreover, the present invention has a laundry amount detecting means for detecting the laundry amount before the drying step and the controlling device, and stops the step to the drying by the controlling device when exceeding of the laundry amount above the predetermined limit is detected, whereby the user needs not judge before starting the washing whether he or she must carry out only the washing-rinsing-spinning step or she can continue until the drying step depending on the laundry amount, and this gives conveniences. LIST OF REFERENCE NUMERALS 14 main body A 18A water tub A 18B water tub B 22 water outlet 25 rotary drum 33 washing electric motor 36 drying electric motor 37 speed reduction gear 39 clutch 43 tilting shaft 47 blower 67 heater 80 controlling device 81 laundry amount detecting means

Claims: A washing-drying machine comprising: a prism-shape main body (14); a water tub (18A, 18B), a rotary drum (25) arranged in the water tub (18A, 18B), a pair of tilting shafts (43) for enabling said water tub to be tilted into a substantially vertical state and a substantially horizontal state; a tilting device (41) for tilting the water tub around the tilting shafts (43); and a path for the drying air consisting of the rotary drum (25), a heater (67), and a blower (47); characterized by the fact that the water tub (18A, 18B) is formed into a substantial cylinder having the upper and bottom parts thereof formed substantially truncated-cone; and that the pair of tilting shafts (43) is arranged at the diagonal cornering parts of the main body (14). A washing-drying machine according to claim 1 wherein: an upwardly opening overflow outlet (21) communicates with a water outlet (22) arranged at the outside of the water tub (18A, 18B) and at the bottom part of the water tub (18A, 18B) the water outlet (22) is provided to be positioned in the vicinity of the corner part of the main body (14) when the water tub (18A, 18B) is substantially in horizontal state; and the overflow outlet (21) is arranged to be positioned in the vicinity of the corner part of the main body (14) when the water tub (18A, 18B) is substantially in vertical state. A washing-drying machine according to claim 1 comprising: a blowing-in port (68) for introducing laundry-drying air into the water tub (18A, 18B) and an exhaust outlet (73) from the water tub (18A, 18B) at an upper opening part of the water tub. A washing-drying machine according to claim 1 comprising: a controlling device (80) for carrying out said washing-rinsing-spinning step in the substantially vertical state of the water tub and said drying step in the substantially horizontal state of the water tub; wherein: the controlling device (80) controls in a manner to carry out the spinning actions before the driving of the tilting device (41). A washing-drying machine according to claim 1 comprising: a controlling device (80) for carrying out the washing-rinsing-spinning step in the substantially vertical state of the water tub and the drying step in the substantially horizontal state of the water tub; and a laundry amount detecting means (81) for detecting the laundry amount before the drying step; wherein: the controlling device (80) stops the transfer to the drying step when exceeding of a laundry amount above a predetermined limit is detected.

Inventors: KADOYA KATSUHIKO, MATSUDA EIJI, OMICHI YUKINOBU, TAKENAKA KENJI, KADOYA, KATSUHIKO, MATSUDA, EIJI, OMICHI, YUKINOBU, TAKENAKA, KENJI
Applicants: MATSUSHITA ELECTRIC IND CO LTD, MATSUSHITA ELECTRIC INDUSTRIAL CO., LTD.
Application year: 1989
Main classification: D06F25
IPC codes: D06F25, D06F37, D06F58, D06F39