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Piezoelectric Film Impact Force Transducer

IP.com Disclosure Number: IPCOM000040898D
Original Publication Date: 1987-Mar-01
Included in the Prior Art Database: 2005-Feb-02
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Merrifield, DL: AUTHOR [+2]

Abstract

Four sheets of piezoelectric film are mounted on a platen at the four quadrants of an area impacted by a character of a type face. Monitoring of the four forces defines the positional adjustment of the printer.

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Piezoelectric Film Impact Force Transducer

Four sheets of piezoelectric film are mounted on a platen at the four quadrants of an area impacted by a character of a type face. Monitoring of the four forces defines the positional adjustment of the printer.

Four piezoelectric films 1-4 (Fig. 1) are mounted on a platen 5 so that each of the four films 1-4 produces a voltage proportional to the pressure exerted on it by a part of a character of a type face, such as a print wheel, for example, striking it. The front and back of each of the films 1-4 are connected by wires 6-9, respectively, to an oscilloscope where the voltages are simultaneously recorded. This enables determination of the force exerted on each segment of a character such as shown for the character M in Fig. 2.

The magnitudes of the forces enable determination of whether a character is hitting top or bottom heavy, or left or right heavy. Adjustment can be made until the force is evenly distributed with this adjustment being robot-controlled if desired. The stress in the character also can be analyzed through using these forces.

Disclosed anonymously

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