초록 ▼

A reclosable fastener assembly (10) for a reclosable plastic bag (18) in which the fastener assembly (10) is sealed to a single wall (14) of the plastic bag. The fastener assembly (10) includes various tear-openable barrier arrangements with the barrier arrangements sealing and protecting the conten

A reclosable fastener assembly (10) for a reclosable plastic bag (18) in which the fastener assembly (10) is sealed to a single wall (14) of the plastic bag. The fastener assembly (10) includes various tear-openable barrier arrangements with the barrier arrangements sealing and protecting the contents of the reclosable plastic bag (18) before being torn open.

대표청구항 ▼

A reclosable fastener assembly (10) for a reclosable plastic bag (18) in which the fastener assembly (10) is sealed to a single wall (14) of the plastic bag. The fastener assembly (10) includes various tear-openable barrier arrangements with the barrier arrangements sealing and protecting the conten

A reclosable fastener assembly (10) for a reclosable plastic bag (18) in which the fastener assembly (10) is sealed to a single wall (14) of the plastic bag. The fastener assembly (10) includes various tear-openable barrier arrangements with the barrier arrangements sealing and protecting the contents of the reclosable plastic bag (18) before being torn open. a material end-use application, the apparatus comprising: a target board for supporting at least one test specimen to be exposed to concentrated solar radiation; a reflector device for reflecting solar radiation and concentrating the reflected solar radiation on to the target board for illuminating the at least one test specimen; an air circulation device for circulating ambient air over the target board for cooling the at least one test specimen, the air circulation device including an electric motor and a fan powered by the electric motor for creating a flow of ambient air; at least one feedback device mounted to the target board for exposure to the concentrated solar radiation and generating a test signal responsive to the temperature thereof and representative of the test specimen temperature; at least two input devices, each for generating a respective dynamic reference signal representative of a different complex temperature cycle of a material end-use application; and a controller connected to a first switch for alternatively selecting one of the at least two input devices and responsive to the selected dynamic reference signal for generating a temperature set point, and the controller further connected to a second switch for alternatively selecting one of the at least one feedback device and responsive to the selected test signal for selectively controlling the application of electrical power to the electric motor in order to control a rate at which ambient air is circulated over the target board, the rate being generally increased when the temperature of the selected one of the at least one feedback device is greater than the temperature set point, and the rate being generally decreased when the temperature of the one of the at least one feedback device is less than the temperature set point, and the rate being generally maintained constant when the temperature of the one of the at least one feedback device is substantially equal to the temperature set point. 10. The apparatus cited by claim 9, wherein the input device is a temperature sensitive component, an apparatus for replaying a recorded environment temperature cycle, an apparatus for generating a complex temperature cycle or a non-contact monitoring device. 11. The apparatus recited by claim 9, wherein the apparatus further includes a trimming offset device connected to the controller and the first switch for applying an offset to the selected reference signal. 12. The apparatus recited by claim 11, wherein the offset applied to the reference signal is an absolute offset, a proportional offset, a function offset or no offset. 13. The apparatus recited by claim 9, wherein the fan is a squirrel cage blower powered by the electric motor. 14. The apparatus recited by claim 9, wherein the air circulation apparatus device includes an air tunnel coupled to the target board, the air tunnel having an outlet extending coextensive with the target board for circulating ambient air over the target board. 15. The apparatus recited by claim 9, wherein the feedback device is secured in a heat conductive relationship to a panel mounted to the target board. 16. The apparatus recited by claim 15, wherein the feedback device further includes a black coating overlying the feedback device and the panel for absorbing solar radiation impinging thereon. 17. The apparatus recited by claim 9, wherein the controller selects one of the at least one feedback device which is operatively compatible with the selected one of the at least two input devices. 18. A system for tightly regulating temperature variability amongst a plurality of accelerated weathering test apparatus, of the type used to concentrate solar radiation upon at least one test specimen, during an exposure test where each apparatus is adapted to dynamically control a test specimen temperature to simulate complex temperature cycles of a material end-use application, the system comprising: each of the plurality of