Patent ID: 9090111
Filing Date: 2015-07-28
Classification: B41J,B65H

Abstract:
1. A printer apparatus comprising: a recording sheet conveying block, the recording sheet conveying block includes a head block that is movable relative to the recording sheet conveying block between a closed state and an opened state, a gap between the recording sheet conveying block and the head block when the head block is in the closed state forms a path for conveying the recording sheet, the head block includes a control circuit connected to and controlling an operation of the light emitting element, the first light receiving element, and the second light receiving element, wherein the control circuit determines, when the light is detected by the second light receiving element, that the recording sheet does not exist in the path, and wherein the control circuit determines, when the light is not detected by the second light receiving element and is detected by the first light receiving element, that the recording sheet exists in the path.