Abstract:
A handheld device and system ins disclosed in which the device has a wide reading head with a narrow optical slot. The reader is used to read color patches on a target or the color output of a printer or other color reproducing device in which the colors to be measured are presented as a number of patches on a target. The light from the sensor is collimated and diffracted and focused onto a sensor for providing electrical signals indicative of the sensed patch. Repeated images of each test patch are taken and sent to the sensor. The output of the sensor is computed by on board electronics and an external computer to determine each color being measured. As indicated, light passes through a slot in the handheld device, is collimated and passed through a diffraction grating or prism so as to split the light into its spectral components and its position of its pixels with respect to the slot. The sensor is of the type found in a digital camera or similar means. Thus, the sensor provides signals which provide the spatial component in one direction, the spectral component in the other, and the intensity. Multiple images are taken of each colored patch. To calibrate the handheld device, the system calculates the spectral values and position of each pixel of a single-colored patch, converting these values into a grey scale and calculating the intensity and density of the light. This is then compared with pre-stored indicia to determine the accurate intensity level. A fully calibrated reader is then used to adjust the output of a color reproducing device, such as a color printer. It performs the same tasks of reading from the color target taken from the color reproducing device and matches the reflected output against stored values and calculates the provided signals to provide control signals to adjust the color reproducing device.
Abstract:
An automated packaging-film testing systems are configured to perform at least one of a Hot Tack Test, Heat Seal Test, and an Aged Seal Test. The systems include at least one of the following components: (a) side-insertion peel clamps that are configured to releasably grip film specimens using a resilient fluid-expandable member that cooperates with a side insertion finger to releasably clamp a film specimen; (b) at least one film specimen positioning clip configured to releasably hold film specimens in position prior to initiation of a test sequence, (c) a motion assembly comprising a single drive system attached to one end portion of an arm that supports and moves all lower seal jaws at each testing station substantially in concert to thereby allow for faster extraction of film specimens from the seal jaws; (d) seal jaw pressure control using a closed-loop pressure system comprising a pressure regulator valve in fluid communication with a pressurized air source without load cells; (e) at least one seal jaw clip configured to releasably slidably mount a seal jaw to a heater block, (f) an upper heater block release mechanism configured to releasably mount a heater block assembly to a reaction frame allow fast operator replacement of heaters and temperature transducers without tools, and (g) an integrated film guide and film cooling system.
Abstract:
Automated packaging-film testing systems perform a Hot Tack Test, Heat Seal Test, and/or an Aged Seal Test. The systems include at least one of: (a) side-insertion peel clamps that are configured to releasably grip film specimens using a resilient fluid-expandable member that cooperates with a side insertion finger; (b) film specimen positioning clips to releasably hold film specimens in position prior to testing, (c) a motion assembly comprising a single drive system that supports and moves all lower seal jaws at each testing station in concert, (d) seal jaw pressure control using a closed-loop pressure system without load cells; (e) jaw clips configured to releasably slidably mount a seal jaw to a heater block, an upper heater block release mechanism, and (g) an integrated film guide and film cooling system.