Abstract: An actuator suitable for a washing machine lid lock employs a shape memory alloy wire indirectly heated by a temperature regulating heater that provides a sliding coupling to the wire and that may be driven, for example, directly by line voltage without the need for temperature regulation circuitry.

Abstract: A drum washing machine having a foldable door includes a cabinet having an opening formed at a front wall of the cabinet, the foldable door provided at the front wall of the cabinet to open or close the opening, and which is separated into frames that fold when the foldable door is opened, and an opening/closing guide mechanism connected between the foldable door and the cabinet to guide the foldable door when the foldable door is being opened or closed.

Abstract: The invention concerns a method for operating a domestic appliance, especially a home dryer (1) or a washing machine, and a domestic appliance (1) which comprises an operating mode for treating textiles with steam. According to the method at least one action for protection of an operator of the domestic appliance (1) is taken when an interruption of an active program for treating textiles with hot steam occurs. The method shall prevent that the operator is hurt by the hot steam generated in the domestic appliance. The domestic appliance (1) comprises a control (40) and a memory (41) storing at least one program for treating textiles with steam, wherein the control (40) is adjusted to execute the inventive method.

Abstract: A washing machine is disclosed. A washing machine includes a top cover at which an opening is formed, a lid hingedly coupled to the top cover, the lid opening and closing the opening, and a hinge member comprising a coupling part of a plate shape coupled to the lid and a hinge part of a cylinder shape hingedly coupled to the top cover, wherein a slot is provided at the hinge part. An object of the present invention is to provide a washing machine capable of improving a structure of a hinge member and to prevent damage of a top cover or lid which might be generated during the opening/closing of the top.

Abstract: A dishwasher and door locking device is provided. In the dishwasher, a tub forms a washing chamber, a door opens and closes a front of the tub, a latch lock has a tub insertion portion inserted in an upper edge of the tub and a latch lock ring formed at a front of the tub insertion portion with a hole having a predetermined size, a latch includes a latch holder and a latch link pivotably connected to a lower end of the latch holder, a latch body is fixed in the door to accommodate the latch, and at least one detection switch is attached to the latch body to detect opening and closing of the door. The latch holder is inserted in the door and formed with a notched portion at a front for coupling with the latch lock.

Abstract: Door on a laundry dryer/drum type washing machine including a door frame having a central opening, for opening/closing an opening in a front part of a cabinet for introduction/taking out of laundry, an outer window fixed to a front surface of the door frame, and an inner window fixed to a rear surface of the door frame, wherein the door frame has a front surface curved in left/right directions, and the outer window is curved the same with the door frame, thereby providing a good design of a door and improving washing and drying performance.

Abstract: A magnetic lid switch assembly includes a first magnetically actuated electrical switch that has a lever arm movable between a first position wherein the first switch is open and a second position wherein the first switch is closed. A second magnetically actuated electrical switch electrically is connected in series with the first switch. The second switch has a lever arm movable between a first position wherein the second switch is open and a second position wherein the second switch is closed. A first actuator is magnetically coupled to the first switch. The first actuator moves the lever arm of the first switch closing the first switch to enable the first switch to pass an electric current when the first actuator is positioned proximate the first switch. A second actuator is magnetically coupled to the second switch.

Abstract: A laundry treatment machine and a door switch thereof are provided. The door switch includes a switch housing unit, which is a predetermined distance apart from a cabinet. Thus, water flown along the cabinet may be able to be discharged through the space between the cabinet and the switch housing unit. Therefore, it is possible to minimize the infiltration of water into the switch housing unit and to improve the durability and the safety of the door switch.

Abstract: A magnetic lid closure sensor uses a magnet sensor element mounted within the washing machine housing below the closed lid. Flux directors conduct flux from a magnet in the lid to the magnet sensor. A lock mechanism employs a hook engaging an aperture in the lid so that opening of the lid does not impart a torque to the hook such as would disengage it, allowing the hook to be activated and deactivated with a simple bi-directional solenoid.

Abstract: A drum washing machine has a cabinet including an opening formed at a front wall of the cabinet to allow laundry to be put into or taken out of the cabinet, a door to open or close the opening of the cabinet, and an opening/closing guide mechanism connected between the cabinet and the door to guide the door downwardly when opening the door such that a front surface of the door is upwardly directed, and to guide the door upwardly moved when closing the door such that the door is vertically openable and closable. The door of the drum washing machine can be easily opened even where the washing machine is installed in a limited space. The door can also be used as a laundry holder in an opened state.

Abstract: A drum washing machine includes a cabinet with an opening formed at a front wall of the cabinet to allow laundry to be put into or taken out of the cabinet, a door to open or close the opening of the cabinet, an opening/closing guide mechanism connected between the cabinet and the door to guide the door downwardly when opening the door such that a front surface of the door is directed upwardly when the door is fully opened, and to guide the door upwardly when closing the door, and an automatic opening/closing mechanism to automatically move the door vertically, and thus, to automatically open/close the door.

Abstract: A laundry machine includes: a casing; a door installed on an upper surface of the casing; a tub installed within the casing; and a buffering unit for buffering an impact when the door is closed. A collision noise or vibration of the door or the casing can be reduced and damage of the washing can be prevented. Also, a hinge assembly for connecting the door to a top cover is provided to stably support the door made of a heavy material such as tempered glass and minimizes an impact or noise when the door is closed.

Abstract: A control apparatus for an electrical domestic appliance with a component that presents a danger to the user and a protection component for protecting the user against a danger presented by the dangerous component, has a control device monitoring the operating states of the dangerous component and the protection component and also to activate and/or deactivate the protection component. A protection device prevents a deactivation of the protection component by the control device outside a deactivation operating range of the dangerous component, in which range deactivation of the protection component is permissible. The control apparatus also has a protection-device monitoring device that initiates a deactivation of the protection component within a simulation operating range of the dangerous component within which the operating state of the dangerous component does not present a danger to the user and which range is outside the deactivation operating range.

Abstract: Disclosed is a drum washing machine, which improves structures of hinge units to rotatably support a door to easily assemble a door with a housing, and firmly endures a load of the door. The drum washing machine includes a housing provided with an opening through which laundry is put into the washing machine; a door connected to the housing to open and close the opening; a first hinge unit rotatably connecting the door to the housing; and a second hinge unit separated from the first hinge unit to rotatably support the door together with the first hinge unit. The second hinge unit causes the door to be supported on the housing. Through the above constitution, a worker may easily assemble the door with the housing, thus increasing a working efficiency.

Abstract: Door assembly including a hook at one side of a cabinet for engagement with a door lock, rotating shafts at opposite sides of the hook, a door frame having an opening for pass through of the hook, a first supporting part on the door frame having a pass through hole for inserting one side of the rotating shaft, and a second supporting part on the door frame having an opened loading groove for loading the other side of the rotating shaft, thereby providing a door assembly which can be assembled readily, and permit more stable operation.

Abstract: A system for controlling a door of a drum type washing machine is provided. This system allows the door to be opened only if there is no water in the washing tub, or if the water level in the tub is very low, so as to prevent water in the tub from cascading out of the washing machine when the door is opened. A water level in the washing tub is sensed, and the sensed water level is compared to a reference water level. The door is locked or unlocked based on the comparison of the sensed water level and the reference water level.

Abstract: An appliance with a hazardous device contains a first controller controlled by a first control element which, in turn, is controlled by a second controller by use of a first switching element. An electrically controllable protection device is provided and is controlled by a second control element, it is possible to deactivate the protection device. A storage capacitor is provided between the first and the second control element and supplies the second control element with energy for a control pulse and is charged by the first control element when the first controller is switched off and is discharged by the first switching element when the first controller is switched on. This circuit generates a safe control circuit. In the event of a possible hazardous state, either the first controller is no longer supplied with energy or the protection device cannot be deactivated, and so danger to a user is precluded.

Abstract: A clothes treating apparatus and a method for controlling the same can prevent a safety incident caused by steam and hot air and improve the safety of the clothes treating apparatus by preventing the door from being opened and closed randomly in the steam step and the dry step.

Abstract: A front-loading machine for treating laundry includes a loading opening, a hinged door, a locking mechanism and an operating device. The loading opening is disposed on a front wall of the machine. The hinged door is receivable by a receiving area on the front wall so as to close the loading opening. The locking mechanism is configured to hold the door in a closed position. The operating device is configured to activate and deactivate the locking mechanism. The operating device includes a sensor configured to detect a contact or a contact-free incursion into a detection zone thereof. The sensor is disposed on at least one of the door and the receiving area on the front wall.

Abstract: A laundry processing apparatus includes a drum, a drum door, and a locking device. A circumferential surface of the drum defines a drum opening that accommodates entrance and exit of laundry into an interior of the drum. The drum door is configured and positioned to enable or prevent access to the interior of the drum through the drum opening. In one implementation, the locking device is configured to move relative to the drum and the drum door when the drum is fixed relative to the drum door, and to automatically couple the drum and the drum door to each other while the drum and the drum door are rotated. In this or another implementation, the locking device is configured to selectively couple or release the drum and the drum door to or from each other on the basis of a rotating velocity of the drum and the drum door.

Abstract: A hook assembly for a door in a washing machine is provided having a decreased number of elements as well as more convenient assembly with respect to conventional apparatus. The hook assembly includes a pair of supporters directly extending from an insider of a doorframe of a washing machine, a shaft penetrating the supporters, a hook rotatably coupled to the shaft, wherein a head of the shaft penetrates the doorframe to be externally exposed, and an elastic member provided in the doorframe to give an elastic force to the hook.

Abstract: A key switch has a switch part and an operating part. The switch part is activated to switch contact points as an operating key is inserted. The operating part includes a driver cam that rotates as it is pushed by the operating key and to activate the switch part and a plurality of lock cams configured to directly lock the driver cam in a normal condition when the operating key is pulled out of the operating part and to rotate as it is pushed by the operating key so as to release the driver cam from its locked condition. The key switch may further include lock cam holder for holding the lock cams in the normal condition when the operating key is pulled out.

Abstract: A magnetic lid closure sensor uses a magnet sensor element mounted within the washing machine housing below the closed lid. Flux directors conduct flux from a magnet in the lid to the magnet sensor. A lock mechanism employs a hook engaging an aperture in the lid so that opening of the lid does not impart a torque to the hook such as would disengage it, allowing the hook to be activated and deactivated with a simple bi-directional solenoid.

Abstract: A laundry machine includes a cabinet and a laundry holding drum rotatably supported therewithin. The drum includes a wall and a drum hatch comprising a section of the wall. A motor is connected to rotate the drum. A controller is configured to operate the motor to drive the drum through a closing operation. The closing operation includes rotating the drum in a direction to bring the drum opening toward the drum hatch to re-close the opening with the drum hatch and to detect stopping of the drum rotation. The controller may provide user feedback that a closure disruption has occurred. The drum hatch is configured to close circumferentially, with a leading edge of the drum hatch approaching a leading edge of the remaining wall. The leading edges are shaped such that interposition of fabric between the leading edges during closure stops the drum hatch reaching a fully closed position.

Abstract: An engaging groove part 25 is provided at the outer circumferential edge of a rotor 20b of an outer-rotor type motor directly connected to the main shaft 14 of a drum 13, and on the other hand, a drum locking device 21 is provided directly below the shaft. The drum locking device 21 is constructed so that a lock pin moves up and down in response to rotation of a torque motor, and when the lock pin advances and fits into the groove of the engaging groove pan 25, the position of the drum 13 is fixed. Thereby, the stopping position of the drum can be fixed with a simple construction.

Abstract: In a drum type washing machine, a drum 23 is mounted to rotate about a horizontal axis extending in the lateral direction in a tub 20. A tub opening 20b with a tub door 20a is formed in the tub 20 under the throw-in opening 3 formed in the front part of the top of the housing. A drum opening 23a with a drum door composed of a double door opening frontward and backward is formed in the peripheral wall of the drum 23. The drum 23 is stopped so that the drum opening 23b coincides with the tub opening 20b. The drum door 23a, forced into its opening direction, is held in a closed position by an engagement of a claw 43 and an engagement hole 53. When a user rotates a operation lever 63b for latching or unlatching the tub door 20, the drum door open/close mechanism 65 functions to make two rods 65a and 65b project or withdraw, whereby the drum door 23a is brought into an engaged or unengaged state. By this mechanism, the drum door 23a opens or closes with the opening or closing operation of the tub door 20a.

Abstract: A laundry drying machine includes a cabinet and a laundry holding drum rotatably supported within said cabinet for rotation about a horizontal axis. The drum includes a cylindrical wall and a pair of ends. A drum hatch comprises a section of the cylindrical wall. A motor is connected to drive rotation of the drum via a drive belt. A hatch engaging member is actuable to grasp and hold the drum hatch relative to the cabinet. A controller operatively connected with the motor, is configured to operate the machine through each of: a) an opening operation in which the drum hatch is grabbed by the hatch engaging member and the drum is rotated to expose an opening, b) a closing operation, which follows a drum opening operation and in which the drum is rotated to re-close a the opening with the drum hatch, and c) a drying operation.

Abstract: A method and apparatus are herein described which provide a door assembly for the drum door and lid of a top loading horizontal axis laundry machine. The drum door is provided with an automatic latch system that can be automatically latched and unlatched on command. In a presently preferred embodiment, the automatic drum latch employs a floating latch bar which engages or disengages a latch strike attached to the drum door, depending on its orientation at the time the drum door is depressed and released. An actuator is utilized to perform the task of depressing and releasing the drum door at the proper times. When the lid of the machine is closed, the drum is rotated to a selected rotational position that determines whether the automatic drum latch will latch or unlatch after an actuator is extended to depress the drum door and then is released.

Abstract: The present invention is primarily directed to an appliance suitable for refreshing/cleaning cloth items in a refreshing/cleaning cycle, said appliance comprising a collapsible or expandable container that is made from a material that defines an interior void space, a container opening, a humidity provider, a heating element, at least one vent and/or filter, and an air circulation device, wherein said appliance further comprises a device to prevent accidental opening of the appliance's container by the user while a refreshing/cleaning cycle is running.

Abstract: Disclosed is a damper mounting structure for a washing machine. The damper mounting structure includes a damper positioned between a tub and a cabinet for supporting the tub, a mounting bracket connected to the damper, and a buffering member provided between the mounting bracket and the cabinet for absorbing oscillation, thus minimizing the transmission of oscillation of the tub during the operation of the washing machine and allowing the washing machine to be operated in a quiet state.

Abstract: A washing machine includes a door locking unit which has a simple construction and is smoothly and reliably operated. The door-locking unit includes a handle which is supported by a first hinge unit, a latch which is supported by a second hinge unit, and an elastic unit which provides an elastic force to the latch. By a rotation of the handle and the elastic force of the elastic unit, the latch is rotated. The handle includes first and second lever parts which are integrated with each other to be rotated around the first hinge unit. The latch includes third and fourth lever parts which are integrated with each other. The third lever part is rotated around the second hinge unit, and is in contact with the second lever part. The fourth lever part is placed toward an interior of the cabinet. Thus, when the first lever part of the handle is pulled, the second lever part pushes the third lever part, compressing the elastic unit.

Abstract: A remote plasma enhanced cleaning apparatus including a main process chamber and a loadlock chamber connected to the main process chamber. The main process chamber includes a staging device adjacent to the loadlock chamber for loading the silicon wafers from the loadlock chamber into the main process chamber and for unloading the silicon wafers from the main process chamber into the loadlock chamber, a carrier robot disposed in a center portion of the main process chamber to transfer the silicon wafers to an adsorption assembly, an anneal assembly, and a cooling assembly which are disposed in the main process chamber around the carrier robot. Each of the adsorption assembly, the anneal assembly, and the cooling assembly includes two stages, wherein each stage is capable of holding a silicon wafer. Thus, the cleaning apparatus improves the uniformity of a process for cleaning silicon wafers while increasing throughput.

Abstract: A magnetic lid closure sensor uses a magnet sensor element mounted within the washing machine housing below the closed lid. Flux directors conduct flux from a magnet in the lid to the magnet sensor. A lock mechanism employs a hook engaging an aperture in the lid so that opening of the lid does not impart a torque to the hook such as would disengage it, allowing the hook to be activated and deactivated with a simple bidirectional solenoid.

Abstract: Disclosed is an apparatus for controlling a door of a drum type washing machine and method thereof. The present invention allows the door to be opened only if there exists no water in the washing tub or if the water level in the tub is very low, by which water is prevented from cascading out of the washing machine when a door is opened. The present invention includes the steps of sensing a water level in a washing tub, comparing the sensed water level to a reference, and locking or unlocking the door according to a result of the comparing step.

Abstract: Disclosed is a dishwasher, by which the dishwasher is simply configured as well as the door is facilitated to open/close. The present invention includes a cabinet having an open front side, a door opening/closing the front side of the cabinet, a locker at the door, a coupling member inside the cabinet to be elastically coupled to or separated from the locker in opening/closing the door, and a switch in rear of the coupling member to sense opening/closing of the door.

Abstract: Systems and methods for controlling locking of a washing machine lid are described. The washing machine includes an agitation element and a basket. The method, in one example embodiment, comprises the steps of sensing a spin speed associated with a spin speed of at least one of the agitation element and the basket, and causing the lid to be locked when the sensed spin speed exceed a first predetermined speed.

Abstract: An irrigation system (10) for conveying a fluid to a region (A) is provided. The irrigation system (10) comprises a main irrigation portion (16) having an end irrigator span (44). A corner irrigator span (42) extends radially from the end irrigator span (44). A control system (90) controls movement of the corner irrigator span (42). The control system (90) includes a linear movement control system (92) to control a corner drive unit (72) of the corner irrigator span (42) and a steering control system (94) controls a steering unit (74) of the corner irrigator span (42). The steering control system (94) includes a controller (100) that receives control signals from four electrical generators (102,104,106,108) to control the steering unit (74) such that the corner irrigator span (42) follows along an outer boundary (B) of the region (A).

Abstract: The present invention relates to a drawer-type washing machine and a locking method thereof. The washing machine includes a housing having one open side and partitioned into a plurality of compartments; cabinets which can be drawn out forward through the open side of the housing, each of the cabinets being positioned in each of the compartments; washing baths for washing the laundry, each of the washing baths being positioned within each of the cabinets; and locking mechanism provided between the housing and the cabinets for restraining the cabinet from being drawn out forward from the housing. The cabinets are automatically drawn out by only operating a switch installed in an outside wall of the housing.

Abstract: The present invention discloses an improved door assembly and a washing machine and a dryer having the same applied thereto. The door assembly of the present invention includes a hinge assembly (150), a door body (200), a hook assembly (300), a lock assembly (400). Since, in the present invention, the hand hold formed in the door body (200) is recessed in an inner circumferential surface of the frame (210) so as not to be visible from an exterior, an outer appearance of the appliance is improved. Of components of the hook assembly (300), since the bracket (320) having a shaft (340) with a hook (310) inserted therein is formed as a unit with the bracket (320) on an inside thereof, with a reduced number of the hook assembly smaller than the related art, an assembly process can be simplified and productivity is improved. The lock assembly (400) provided to the cabinet (100) to hold the hook (310) includes a hook holding device and a locking device.

Abstract: A door latching mechanism for the door of an electric household appliance, in particular a washing machine, is described. The door latching mechanism comprises an element (34) of which at least a deflection part changes its spatial position (C, D) upon a change in temperature of the element (34) and thereby operates a bar element (32) for locking and unlocking the door. The door latching mechanism further comprises an electromagnetic device (46) comprising an actuating member (48) for unlocking the door. The actuating member (48) cooperates with an extension (40A) of the bar element (32).

Abstract: A laundry appliance (10) comprises an outer casing (14) and a container (34) mounted inside the outer to permit movement of the container (34) in use. The container (34) has a door (42) for closing the opening in the container which moves with the container (34) during use of the applicance. A seal (80) is located between the outer casing (14) and the container (34). The seal (80) extends radially inwardly from the lip (85) of the opening in the outer casing (14) and lies against the front surface or the container (34). The seal has a rigid portion (81) with a channel (83) for receiving the lip (85) of the container and a flexible portion (82).

Abstract: A toy washing machine has a safety function to prevent the release of water and the like. The safety function locks the door of the toy washing machine when the machine is filled with water. As water is poured into the machine, it flows to a container positioned below an internal drum cabin. The container has a float that rises as the container fills with water. The rising of the float activates a lever device that is connected to a pin. The pin locks the door and prevents the door from opening when water is within the machine. The door of the machine has a seal made of heterotypic silicon rubber that prevents leakage.

Abstract: A safety device for a laundry washing machine or the like where the washing machine comprises a treatment chamber (12) for laundry that is pressurized in order to treat the laundry with a treating agent, for instance, carbon dioxide. The treatment chamber has an inlet opening (13) which during the treatment is covered by a door (16) that is secured to a housing (11) enclosing the chamber by means of a first holder device (35) which is part of a locking means. The locking means also comprises a second holder device (34) which is activated if the first holder device (35) is deactivated and thereby keeps the door (16) in its closed position as long as chamber is pressurized.

Abstract: In a drum type washing machine, a drum 23 is mounted to rotate about a horizontal axis extending in the lateral direction in a tub 20. A tub opening 20b with a tub door 20a is formed in the tub 20 under the throw-in opening 3 formed in the front part of the top of the housing. A drum opening 23a with a drum door composed of a double door opening frontward and backward is formed in the peripheral wall of the drum 23. The drum 23 is stopped so that the drum opening 23b coincides with the tub opening 20b. The drum door 23a, forced into its opening direction, is held in a closed position by an engagement of a claw 43 and an engagement hole 53. When a user rotates a operation lever 63b for latching or unlatching the tub door 20, the drum door open/close mechanism 65 functions to make two rods 65a and 65b project or withdraw, whereby the drum door 23a is brought into an engaged or unengaged state. By this mechanism, the drum door 23a opens or closes with the opening or closing operation of the tub door 20a.

Abstract: The invention concerns a closing device for a washing machine or clothes dryer with a machine door that locks a loading opening exhibiting a closing piston mounted onto the machine door hinged to the machine housing and a lock in the area of the loading opening, whereby the lock is provided with a latching element that brings the closing piston into a latching closed position when the machine door closes and releases it to an open position when the machine door is opened. An automatic adjustment of the closing piston to the latching element when the machine door closes is achieved in that the closing piston can be adjusted horizontally to a limited extent in the door rim, and that the closing piston with its nose is alignable with the latching element in a receiving element in the door frame around the loading opening.

Abstract: The present invention relates to a drawer-type washing machine and a locking method thereof. The washing machine comprises: a housing having one open side and partitioned into a plurality of compartments; cabinets which can be drawn out forward through the open side of said housing, each of said cabinets being positioned in each of said compartments; washing baths for washing the laundry, each of said washing baths being positioned within each of said cabinets; and locking means provided between said housing and said cabinets for restraining said cabinet from being drawn out forward from said housing, in which the cabinets are automatically drawn out by only operating a switch installed in an outside wall of the housing. It is prevented that the washing machine falls down as all of the cabinets are drawn out biasing the center of gravity forward.

Abstract: An automatic washer includes a control which allows the user to observe the operation of the washer under a set condition or conditions. When these conditions are met, the user may open the door or lid of the washer and observe, for a predetermined period of time, the wash activity. After reclosing the door or lid, the washer may be restarted to continue the wash cycle.

Abstract: A lid lock for a washing machine or the like employs a rapid bistable electromagnetic actuator that is released at a predetermined time interval after the cessation of a spin signal, the time interval being selected to allow the spin basket to coast to a stop prior to the lid being unlocked. Because the actuator is bistable, it can remain locked despite possible power failure during which the spin basket may still be coasting yet the driving circuitry stores reserved power to unlock the lid after a suitable time delay. These same components can provide protection against entrapment in which the lid closure activates the spin cycle and lock because of a previous initiation of the spin cycle signal. Here, for the spin cycle to be initiated, the spin cycle signal must occur after lid closure.

Abstract: The invention relates to a laundry treatment apparatus like washing machines, laundry dryers or a washer-dryers with a rotatably mounted drum (6) with an at least approximately horizontal axle and with a drive motor (10) structured as a synchronous motor (10) energized by permanent magnets arranged on the drum (6) shaft, the stator (16) of the motor (10) being provided with a winding (18) which is energized by a converter. In order to optimize the motor in such machines in respect of energy consumption, noise development and costs it is proposed to design the winding (18) as a single pole winding, whereby the number of stator poles (27) and of the magnet poles (23) is different, and to utilize a frequency converter (104) as the converter the output voltage of which being set such the continuous currents are generated in all winding strands.

Abstract: A safety device for a laundry washing machine or the like where the washing machine comprises a treatment chamber (12) for laundry that is pressurized in order to treat the laundry with a treating agent, for instance, carbon dioxide. The treatment chamber has an inlet opening (13) which during the treatment is covered by a door (16) that is secured to a housing (11) enclosing the chamber by means of a first holder device (35) which is part of a locking means. The locking means also comprises a second holder device (34) which is activated if the first holder device (35) is deactivated and thereby keeps the door (16) in its closed position as long as chamber is pressurized.