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Magnetic Card Bottoming Device for Hand-operated Reader/Encoder

IP.com Disclosure Number: IPCOM000041116D
Original Publication Date: 1987-Aug-01
Included in the Prior Art Database: 2005-Feb-02
Document File: 1 page(s) / 12K

Publishing Venue

IBM

Related People

Carnes, JM: AUTHOR [+2]

Abstract

A major problem encountered with hand-operated magnetic card reader/encoders is that the operator often fails to fully bottom the card in the slot. When encoding, this can cause coding errors and may destroy data on other tracks. The incidence of this problem is greatly reduced by a whiffle wheel in the card path preceding the read/encode head. This wheel forces the card towards the bottom of the slot.

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Magnetic Card Bottoming Device for Hand-operated Reader/Encoder

A major problem encountered with hand-operated magnetic card reader/encoders is that the operator often fails to fully bottom the card in the slot. When encoding, this can cause coding errors and may destroy data on other tracks. The incidence of this problem is greatly reduced by a whiffle wheel in the card path preceding the read/encode head. This wheel forces the card towards the bottom of the slot.

Figure 1 shows whiffle wheel 10, which is made of soft rubber. It shows that a number of radial slots 1, divide the outer portion of the wheel into discrete paddles, or arms 2, which being attached only to the hub 3 at the inner end, are free to flex individually.

Figure 2 shows wheel 10 mounted at an angle to the bottom of the slot and positioned so that it projects through one side of the slot with approximately .015" clearance between its perimeter and the opposite side of the slot. It is free to rotate on axis 5. It is seen that as magnetic stripe card 6 is drawn through the slot in the direction shown, it passes wheel 10 before reaching encode head 7. It is apparent that in passing wheel 10 card 6 forces the wheel to rotate and also successively deflects arms 2 in a generally upward direction perpendicular to the plane of the wheel. It is apparent that in resisting this deflection, and due to the rotation of the wheel, arms 2 exert a downward force on card 6. This together with the forward motion...