Apparatus and methods for positioning a document against a read head in a document processing system
AssigneeUnisys Corporation
InventorsMichael J. Moore, Joe M. Gagnier
Life of this patent
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Abstract
Apparatus and methods are described for controlling the positioning of a document relative to a read head in a document processing system. A pressure applying element urges the document against the read head. A speed measuring element rotated by the pressure applying element transmits, to the processing system for use in processing the document, data describing document speed sensed by the pressure applying element at the read head. Distance is eliminated between the read head and speed sensing element, thus eliminating or reducing speed feedback data inaccuracies. Because pressure is applied to the document directly at the read head, read error rates are further reduced.
Claims21
An apparatus adapted for use in a document processing system to control the positioning of a document for readying by a read head, the processing system configured to process the document using data describing the speed of the document during reading, the apparatus comprising:
- a pressure applying element configured to urge the document against the read head;
- and
- a speed measuring element configured to be rotated by the pressure applying element and to transmit, to the processing system, data describing the speed of the document sensed by the pressure applying element at the read head.
In combination with a document processing system configured to read a document using a read head across which the document is moved while it is read, the document processing system further configured to process the document using data describing the speed of the moving document, a speed sensing element configured to rotate while in contact with the moving document at the read head and thereby to transmit data describing the document speed to the processing system.
In combination with a document processing system configured to read a document using a read head across which the document is moved while it is read and further configured to utilize data describing the speed of the moving document to control positioning of the moving document, a rotating pressure applying element that presses the document at an against the read head while driving the document across the read head, the pressure applying element further configured to sense, at the read head, the speed of the document and to transmit data describing the speed to the processing system.
In combination with a document processing system configured to read a document using a read head across which the document is moved while it is read, the document processing system further configured to process the document using data describing the speed of the moving document, a pressure applying element that presses the document at and against the read head, the pressure applying element further configured to sense the speed of the document at the read head and to transmit data describing the speed to the processing system.
A method for positioning a document for reading by a magnetic read head of a document processing system, the document imprinted along an edge with magnetic ink characters, the method comprising the steps of:
- pressing the imprinted document edge against the read head as the document is moved past the read head;
- sensing the speed of the moving document;
- and
- transmitting data describing the document speed to the processing system for use in controlling the movement of the document, wherein the sensing step is performed at the read head.
Dependencies are inferred from the claim text.