Abstract: The present invention relates to an ink-supplying system. The ink-supplying system includes an ink tank for receiving ink therein, a vacuum pump configured for providing a pressure below atmospheric pressure in the ink tank, a first regulating unit, at least one second regulating unit, and a third regulating unit disposed between the vacuum pump and the ink tank, and in communication with each other. The first regulating unit and the third regulating unit each includes a pressure regulating valve and a buffer tank connected therewith, and the at least one second regulating unit comprises a closed-loop pressure regulating valve and a buffer tank connected with the closed-loop pressure regulating valve.

Abstract: An inkjet head includes a main body, a film, a piezoelectric atomizer, a cover and a nozzle plate. The main body includes a cavity receiving a fluid with an opening connecting the cavity. The cover is fastened to a top end of the main body. The film is interposed between the cover and the main body. The nozzle plate includes a plurality of nozzles. The nozzle plate is disposed on a bottom end of the main body. The piezoelectric atomizer is interposed between the cover and the film. The piezoelectric atomizer introduces pressure variations in a static pressure to atomize the fluid.

Abstract: A three-dimensional printer includes an inkjet head and a nozzle plate. The inkjet head includes a top wall and two sidewalls connecting with the top wall. The top wall of the inkjet head includes a top nozzle. Each sidewall includes a side nozzle. The nozzle plate is positioned on an inner surface of the inkjet head. The nozzle plate includes a top area and two opposite side areas connecting with the top area. The top area of the nozzle plate includes a plurality of holes corresponding to the top nozzle of the inkjet head. Each side area of the nozzle plate includes a plurality of holes corresponding to the side nozzle of the inkjet head.

Abstract: The present invention relates to an apparatus (10) for regulating air pressure in an ink tank (14). The apparatus includes a vacuum pump (12) configured for providing a pressure below atmospheric pressure in the ink tank. A first regulating unit (16), a second regulating unit (18), and a third regulating unit (20) are disposed between the vacuum pump and the ink tank, and in communication with each other. The first regulating unit and the third regulating unit each include a pressure regulating valve and a buffer tank connected with the pressure regulating valve, and the second regulating unit includes a closed-loop pressure regulating valve (180) and a buffer tank (182) connected with the closed-loop pressure regulating valve.

Abstract: An exemplary rotation module configured for a gantry apparatus includes a rotary plate, a base, and a bearing. The rotary plate has a through hole. The base is arranged in the through hole. The bearing is arranged between the rotary plate and the base. The bearing includes an inner race and an outer race rotatable relative to the inner race. The inner race is securely coupled to the base and the outer race is securely coupled to the rotary plate, whereby the rotary plate is rotatable relative to the base. A gantry apparatus are also provided.

Abstract: An ink jet device includes a print head, an ink tank containing ink therein, a first motor, a second motor, and a control unit. The ink tank is connected with the print head and configured for supplying ink to the print head. The ink contained in the ink tank exerting a static hydraulic pressure onto the print head. The first motor is configured for driving the print head to move in a direction selected from the group consisting of a vertical direction, a horizontal direction, and a combination thereof. The second motor is configured for substantially simultaneously driving the ink tank to move in response to vertical movement of the print head so as to maintain the static hydraulic pressure that the ink exerts on the print head.

Abstract: An exemplary clamping apparatus includes a supporting body, a plurality of clamping units installed on the supporting body, a PWM controller, and a detection unit. Each clamping unit includes a magnet, a clamping pin, an electrical coil, and a coil core mechanically engaged with the clamping pin. The magnet is configured for holding the clamping pin at a target position. The PWM controller is configured for supplying a pulse signal to the respective electrical coil of each clamping unit and for thereby creating a magnetic force causing a corresponding coil core and a corresponding clamping pin to, synchronously, move. The detection unit is configured for detecting a back electromotive force representative of the arrival to the target position of a clamping pin and signaling the PWM controller to stop supplying the pulse signal. A clamping process utilizing the clamping apparatus is also provided.

Abstract: The present invention relates to an apparatus (10) for regulating air pressure in an ink tank (14). The apparatus includes a vacuum pump (12) configured for providing a pressure below atmospheric pressure in the ink tank. A first regulating unit (16), a second regulating unit (18), and a third regulating unit (20) are disposed between the vacuum pump and the ink tank, and in communication with each other. The first regulating unit and the third regulating unit each include a pressure regulating valve and a buffer tank connected with the pressure regulating valve, and the second regulating unit includes a closed-loop pressure regulating valve (180) and a buffer tank (182) connected with the closed-loop pressure regulating valve.

Abstract: An ink-jet device (20) is provided. The ink-jet device includes an ink reservoir (22), a print head (24), and a carry-in pipe (26) connected between the ink reservoir and the print head. The ink-jet device further includes an air outlet pipe (28) and a balance pipe (30). The air outlet pipe is connected with the print head and intercommunicates with the atmosphere. The balance pipe is connected between the carry-in pipe and the air outlet pipe. A method for eliminating air bubbles in print head is also provided.

Abstract: An ink jet device includes a print head, an ink tank containing ink therein, a first motor, a second motor, and a control unit. The ink tank is connected with the print head and configured for supplying ink to the print head. The ink contained in the ink tank exerting a static hydraulic pressure onto the print head. The first motor is configured for driving the print head to move in a direction selected from the group consisting of a vertical direction, a horizontal direction, and a combination thereof. The second motor is configured for substantially simultaneously driving the ink tank to move in response to vertical movement of the print head so as to maintain the static hydraulic pressure that the ink exerts on the print head.

Abstract: An exemplary rotation module configured for a gantry apparatus includes a rotary plate, a base, and a bearing. The rotary plate has a through hole. The base is arranged in the through hole. The bearing is arranged between the rotary plate and the base. The bearing includes an inner race and an outer race rotatable relative to the inner race. The inner race is securely coupled to the base and the outer race is securely coupled to the rotary plate, whereby the rotary plate is rotatable relative to the base. A gantry apparatus are also provided.

Abstract: A memory card reader. The memory card reader includes a housing and a device. The device is disposed in the housing for accepting different types of memory cards. The device includes a body, a first engaging plate, a second engaging plate, and a resilient plate. The body defines an accommodation for accepting different types of memory cards. The first engaging plate fastens to the body and has a release post. The second engaging plate selectively connects to the first engaging plate in a first position or a second position. The second engaging plate defines a slot in which the release post is contained and moves therein. The resilient plate contacts and exerts pressure on the body so that the first engaging plate fastened to the body is pushed toward the second engaging plate and connects thereto.

Abstract: A memory card reader. The memory card reader includes a housing and a device. The device is disposed in the housing for accepting different types of memory cards. The device includes a body, a first engaging plate, a second engaging plate, and a resilient plate. The body defines an accommodation for accepting different types of memory cards. The first engaging plate fastens to the body and has a release post. The second engaging plate selectively connects to the first engaging plate in a first position or a second position. The second engaging plate defines a slot in which the release post is contained and moves therein. The resilient plate contacts and exerts pressure on the body so that the first engaging plate fastened to the body is pushed toward the second engaging plate and connects thereto.

Abstract: A three-dimensional engaging device. The three-dimensional engaging device includes a first fastener and a second fastener. The first fastener includes a side wall, a first block, and a second block. The first and second blocks are respectively connected to the side wall. The second fastener engages the first fastener. The side wall constrains the second fastener in a direction x. The first block constrains the second fastener in a direction y, and the second block constrains the second fastener in a direction z. The x, y, and z axes are substantially perpendicular to each other.