Xerox Corporation

Calvin John Marlett

Edwin A Reed

Richard C Johnson

Zhigang Fan

Reiner Eschbach

Shen-Ge Wang

William A Fuss

William F Hug

James R Low

Lily A Ray

A system for generating a security mark includes a data reception component that receives information. A security mark generation component in communication with the data reception component generates at least one security mark configuration based at least in part upon the received information. The at least one security mark configuration includes at least one simulation mark which resembles a natural feature. An application component applies one configuration of the at least one security mark configurations to a recipient. The applied security mark configuration obeys at least one rule whereby the security mark is distinguishable from the natural feature which it resembles by a system for detection of security marks.

Detection of security marks simulating natural defects for embedding information in documents

Embodiments herein print documents comprising magnetic ink characters, capture overlapping partial images of the MICR line of magnetic ink characters, and stitch these partial images together to form a complete image of the MICR line. This allows the embodiments to accumulate the routing number, the account number, the check number, and the amount data in the magnetic ink characters on each document to produce image-based data including accumulated amounts (e.g. ledger). Then, the image-based data including the accumulated amounts can be compared to the anticipated data from the original source of information to verify the accuracy of the printing operations.

Check printing auditing systems and methods

An internal mirror metal vapor laser, and in particular, a helium-cadmium laser discharge tube, which is economical, compact and has a relatively long operating and shelf life, the operating life typically exceeding 10,000 hours. A positive column helium-cadmium laser tube of the consumable type and having optical resonator mirrors integral with the tube ends to hermetically seal the tube is provided which includes a relatively large volume cadmium reservoir capable of containing sufficient cadmium for operating life times exceeding ten thousand hours. A heater is applied to the cadmium reservoir for controlling the cadmium vapor pressure. The helium pressure is actively controlled by releasing helium from a high pressure helium reservoir when the helium pressure is less than a predetermined value. This is accomplished by providing a signal representing the sensed pressure of the helium in the laser discharge tube and comparing electronically this signal with a signal representing the pressure of helium at a desired operating condition (reference pressure). If the sensed pressure is lower than the reference pressure indicating a loss of helium gas, a source of electric current supplies current to a heating element which in turn heats a temperature sensitive permeable membrane. The temperature sensitive membrane, which forms a portion of a reservoir containing high pressure helium, allows the helium in the reservoir to leak into the laser tube when heated until the sensed pressure is substantially equal to the reference pressure. A pair of thermistors mounted within the laser discharge tube are preferably utilized to effectively provide the sensed and reference pressure signals. In particular, the thermistors are utilized to compensate the effects of ambient temperature changes, thereby allowing an accurate measure of the laser discharge pressure. A diffusion confinement section and a cataphoretic confinement section are provided adjacent one end mirror and a diffusion confinement section is provided adjacent the other end mirror to protect the end mirrors from condensing cadmium vapor or other damage. A baffle member is placed adjacent the cathode end of the discharge capillary which separates the cadmium condensate from the discharge at the cathode to inhibit entrappment or gettering of helium gas by the cadmium.

Metal vapor laser discharge tube

The output beam of a laser tube is modulated between a maximum intensity (lase) and minimum (no-lase) intensity levels by varying the laser tube current between corresponding values. The device for controlling the output beam comprises a single transistor provided in the current path of the laser tube, the current therethrough being controlled, or modulated, to provide the modulated laser beam. The device is capable of operating in a plurlity of modes. In the preferred mode, an analog signal is coupled to the transistor control circuitry whereby the laser beam intensity is linearly modulated between the maximum and minimum levels to provide a laser beam having grey scale capabilities. In a second operating mode, a digital signal is coupled to the transistor control circuitry whereby the laser beam intensity is modulated to a constant value between minimum and maximum levels.

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La Crescenta, CA, United States of America

Calvin John Marlett