公开(公告)号：US5998745A

公开(公告)日：1999-12-07

申请号：US52692

申请日：1998-03-31

申请人： Joseph Benassi, Jr. ,  Roger L. Audet ,  David M. Leclerc

发明人： Joseph Benassi, Jr. ,  Roger L. Audet ,  David M. Leclerc

IPC分类号： H01H35/26 ,  B41C1/00 ,  B41C1/05 ,  H01H35/34 ,  H01H35/24

CPC分类号： H01H35/346 ,  H01H35/34

摘要： A switch detects a vacuum that is created by suctioning air through a port hole in a media support surface. The switch includes a first layer having (i) a first hole therein which is at least partially aligned with the port hole in the media support surface and (ii) a conductive region, and a second layer, which is disposed above the first layer relative to the media support surface and which is substantially non-conductive. The second layer has a second hole therein which aligns, at least in part, to the first hole in the first layer and to the port hole in the media support surface so as to allow air to flow through the port hole, the first hole, and the second hole. A third layer, which is disposed above the second layer relative to the media support surface, comprises a printed circuit pattern that aligns, at least in part, to the second hole. The printed circuit pattern on the third layer comprises an open circuit. When air is suctioned through the port hole, the first hole and the second hole, a vacuum is created which draws at least a part of the printed circuit pattern through the second hole and into contact with at least a part of the conductive region of the first layer such that the at least part of the conductive region of the first layer completes the open circuit of the printed circuit pattern.

摘要翻译： 开关检测通过介质支撑表面中的孔口吸入空气而产生的真空。 开关包括第一层，其具有（i）其中的第一孔，其中至少部分地与介质支撑表面中的孔口对准，以及（ii）导电区域和第二层，其设置在第一层相对的上方 到介质支撑表面并且其基本上不导电。 第二层具有至少部分地与第一层中的第一孔和介质支撑表面中的孔口对准的第二孔，以允许空气流过孔口，第一孔， 和第二个洞。 相对于介质支撑表面设置在第二层上方的第三层包括至少部分地对准第二孔的印刷电路图案。 第三层上的印刷电路图案包括开路。 当通过端口孔，第一孔和第二孔吸入空气时，产生真空，其通过第二孔吸引印刷电路图案的至少一部分并与至少一部分导电区域接触 第一层，使得第一层的导电区域的至少一部分完成印刷电路图案的开路。