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Feed Roller Separating Mechanism for Document Insertion

IP.com Disclosure Number: IPCOM000120523D
Original Publication Date: 1991-May-01
Included in the Prior Art Database: 2005-Apr-02
Document File: 2 page(s) / 67K

Publishing Venue

IBM

Related People

Harris, RH: AUTHOR

Abstract

Many current printers require that the document be inserted either from below the rollers or from the top of the rollers. A document sensor (not shown) signals that a document is present and spaces the document to the programmed location. If no standard location is programmed, a document feed button is pressed and the document is advanced until the desired position is reached and the document feed button is released. This action does not allow side insertion of the document and requires two hands (one on the document and one on the button). IBM point-of-sale printers traditionally allow the document to be freely positioned manually by moving the document to near the desired position and then moving the document slightly to the right to actuate the document sensor. The printer then begins to print.

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This is the abbreviated version, containing approximately 60% of the total text.

Feed Roller Separating Mechanism for Document Insertion

      Many current printers require that the document be
inserted either from below the rollers or from the top of the
rollers.  A document sensor (not shown) signals that a document is
present and spaces the document to the programmed location.  If no
standard location is programmed, a document feed button is pressed
and the document is advanced until the desired position is reached
and the document feed button is released.  This action does not allow
side insertion of the document and requires two hands (one on the
document and one on the button).  IBM point-of-sale printers
traditionally allow the document to be freely positioned manually by
moving the document to near the desired position and then moving the
document slightly to the right to actuate the document sensor.  The
printer then begins to print.  This requires only one hand (the one
holding the document).

      The figure shows a document feed roller assembly.  This
assembly is imbedded in a point-of-sale printer to provide line
feeding of inserted documents.  For the sake of clarity, the rest of
the printer is not shown.

      This mechanism is similar to that used in many point-of-sale
printers currently available, except that a clutch 1 and lift lever 2
are added on one side of the document feed rollers 3.  The one-way
clutch 1 idles when forms are fed in the document feed direction 4.
When the motor is reversed, the one-way clutc...