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Browse Prior Art Database

Automatic Adjusting Document Validation Station

IP.com Disclosure Number: IPCOM000049409D
Original Publication Date: 1982-Apr-01
Included in the Prior Art Database: 2005-Feb-09
Document File: 2 page(s) / 35K

Publishing Venue

IBM

Related People

Anderson, TW: AUTHOR

Abstract

In impact printers of the wire matrix type, some adjustment is necessary between the print head and platen spacing to accommodate variable thickness documents. In a point-of-sale terminal printer various documents may be inserted for printing, such as checks, receipts, tickets, coupons, etc. These documents may have many different thicknesses and, for proper printing, must be registered accurately to the point of the print line where the wire matrix print ends will impact with sufficient force.

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Automatic Adjusting Document Validation Station

In impact printers of the wire matrix type, some adjustment is necessary between the print head and platen spacing to accommodate variable thickness documents. In a point-of-sale terminal printer various documents may be inserted for printing, such as checks, receipts, tickets, coupons, etc. These documents may have many different thicknesses and, for proper printing, must be registered accurately to the point of the print line where the wire matrix print ends will impact with sufficient force.

Fig. 1 illustrates a mechanism for automatically registering the platen to the desired position to register the document face on the print line. Platen 1 has a step block pattern 2 cooperating with a locking block 3, as shown. The block 3 may be reciprocated by a cam and lever mechanism (not shown) to slide it between the guides 4.

When the end of block 3 is fully withdrawn to the right in the figure, platen 1 and step block 2 are free to move in the upward direction without interference. Contact between the under surface of the step block 2, as shown at A, with the machine frame portion B occurs. When a document of a given thickness is inserted between the registration roller 5 and feed roller 6, the machine frame B pivots at a pivot point 7 and forces step block 2 and platen 1 upward by an amount dictated by the thickness of document 8. An operator will then insert the locking block 3 which will abut against one of the steps in the step block 2 to lock the platen 1 in vertical position.

The system may then be engage...