| 摘要 |
<p>Document handling apparatus in which a document reader is disposed to scan indicia carried by a document occupying a perforated platform at the reading station. A vacuum manifold is cooperable with the perforations in said platform to reduce the pressure at the platform sufficiently to maintain the document in position to be scanned by the reader. A single blower serves several purposes, providing cooling air for electronic equipment included in the reader, and inducing the vacuum at the reading station which serves to keep the documents secured in proper position on the platform. Conduit structure, including first and second branches, is coupled with the blower to provide for drawing of air through said branches. One branch is connected to the vacuum manifold and the second branch presents sufficient restriction to insure that the blower induces, through the first branch, a pressure low enough to hold the document in position, while yet drawing sufficient air through the second branch and across the electronic equipment to cool the same. The output of the blower also is used to provide cooling air for the motor of apparatus which serves to remove documents from the platform.</p> |
