Invention Grant
US08387972B1 Paper present sensing for a paper tray through media size sensing board 有权
纸张通过介质尺寸检测板检测纸盒

Paper present sensing for a paper tray through media size sensing board
Abstract:
A media sheet tray includes a first media size sensor, a second media size sensor, a first circuit connected to the first media size sensor, a second circuit connected to the second media size sensor, and a switch within the second circuit. The switch can be in an open position disconnecting a continuity of the second circuit, or in a closed position maintaining the continuity of the second circuit. Media being within the media sheet tray closes the switch. Further, a combination of the first circuit connecting to the first media size sensor and the second circuit being discontinuous indicates that paper is absent from the media sheet tray.
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