Coating implements with material supply – Supply container and independent applicator
Reexamination Certificate
2000-01-10
2001-02-13
Recla, Henry J. (Department: 3751)
Coating implements with material supply
Supply container and independent applicator
C118S031500, C427S001000
Reexamination Certificate
active
06186688
ABSTRACT:
CROSS REFERENCE TO RELATED APPLICATIONS
The Disposable Magnetic Fingerprint Brush references U.S. Pat. 4,381,159 in the general concept of using a magnet to distribute ferrous fingerprint powder when dusting for latent fingerprints on non-metal surfaces.
BACKGROUND OF THE INVENTION
This application pertains to the field of Law Enforcement and is a device for developing latent fingerprints on a variety of non-metal surfaces. Information on the technique used in “dusting”for latent prints can be found in the book, The Science of Fingerprints 1977 issue (F.B.I./ Dept. of Justice) chapter 14. A magnetic brush allows even distribution of ferrous fingerprint powder and ease in clean up from the surface being dusted, which is conducive to better quality prints. Problems involved in the prior use of magnetic fingerprint brushes are; 1) Sterilizing the brush after biohazard crime scenes, without causing damage to the brush. (submersing the entire brush can lead to mechanical failure) 2) Rigid materials used in construction of prior magnetic brushes caused distortion of latent prints. Anytime the brush came in contact with the surface being printed, a scratch could be detected. 3) Prior designs can't be operated upside down without the use of an internal tension spring. 4) When the tension spring gets jammed or breaks, the magnetic brush won't work.
BRIEF SUMMARY OF THE INVENTION
The general idea of the Disposable Magnetic Fingerprint Brush is to provide Law Enforcement personnel with a simple device for developing latent prints with the advantage of a removable, disposable cover. Other surprise advantages were realized when a non-rigid plastic material was used as the disposable cover. A light grip against the outer cover holds the magnet engaged and allows operation in any position, without internal tension springs. The flexible outer cover is less abrasive when inadvertent contact is made between the brush and the surface being dusted, which lessens distortion of the latent print.
REFERENCES:
patent: 4214874 (1980-07-01), White
patent: 4381159 (1983-04-01), Payne
deVore Peter
Recla Henry J.
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