Abstract: A pattern identification system includes a platform, a conveying device, an illumination device, a video camera unit, a controller, a programmable identification member and a switching member. The conveying device transports a feeding sample sheet on the platform mounted in the pattern identification apparatus. The illumination device projects light on the sample sheet. The controller controls the video camera to magnify an image with a predetermined multiple sufficient for identification at the predetermined position of the sample pattern so as to allow capturing an identifiable image of difference with respect to a programmed feature. The identifiable image of the selected pattern is captured and sent to the programmable identification member for identifying the selected pattern of the sample sheet. After identifying, the switching member is switched for outputting and sorting the sample sheet by the controller in response to a control signal of the programmable identification member.

Abstract: The specification discloses an ink container having a pressure stabilizer module. The module contains an airtight membrane, a passive plate, and an elastic device. The airtight membrane separates a box into an ink chamber and an air chamber. The passive plate is connected to one side of the airtight membrane and to the elastic device. The elastic device is normally depressed or stretched to move the airtight membrane. The ink chamber is thus slightly extended outward and maintains a negative pressure. As the ink stored inside the ink chamber gets less, the elastic device provides a restoring force to push or drag the passive plate. The negative pressure is thus maintained within a specific range. The invention further uses a conic spiral spring to avoid ink waste.

Abstract: A pattern identification system includes an illumination device, a video camera unit, a controller and a programmable identification member. The illumination device projects light on a sample pattern disposed in the system. The video camera unit captures a first image for measuring a reference coordinate of the sample pattern. The video camera unit is moved to a predetermined position by the controller. The controller controls the video camera to magnify an image sufficient for identification so as to allow capturing an identifiable image of difference with respect to a programmed feature. The video camera unit captures a second identifiable image of the sample pattern and sends it to the programmable identification member for identifying the sample pattern.

Abstract: A back pressure regulator for ink-jet pen, using a cover element and recess in the pen to form a specific gap, to constantly maintains a quantity of ink to form a liquid-air interface, to prevent excess air freely to flow into the ink-jet pen, so as to act as a pressure regulator. The ink-jet pen has an orifice providing a passage in the recess for ambient air to bubble into, to prevent the back pressure from rising above a level that would cause malfunction of the pen. The recess includes at least two grooves which starts from the orifice, and provides a diversity of grooves in opposite or different directions. The grooves further having an inclined or curved bottom surface to define a gap between the cover element and the bottom surface thereof. The gap between the cover element and recess is smallest near the orifice and increases as the distance from the orifice increases.

Abstract: The specification discloses an ink container having a pressure stabilizer module. The module contains an airtight membrane, a passive plate, and an elastic device. The airtight membrane separates a box into an ink chamber and an air chamber. The passive plate is connected to one side of the airtight membrane and to the elastic device. The elastic device is normally depressed or stretched to move the airtight membrane. The ink chamber is thus slightly extended outward and maintains a negative pressure. As the ink stored inside the ink chamber gets less, the elastic device provides a restoring force to push or drag the passive plate. The negative pressure is thus maintained within a specific range. The invention further uses a conic spiral spring to avoid ink waste.