Object recycling by laser of coating material

Details Object recycling by laser of coating material Object recycling by laser of coating material

1995-08-09

1997-03-25

McPherson, John A.

Radiation imagery chemistry: process, composition, or product th

Erasable imaging

430945, 2191216, 21912176, 2191218, 21912182, 21912185, 427554, 427555, B05D 306, G21H 500, B23K 2600

Patent

active

056143397

ABSTRACT:
Coated objects are recycled by irradiation with a laser beam. The invention is applied to objects (such as documents) that include an entry surface, a surface coated with a coating (such as text or graphics printed with copier or printer toner), and a body interposed between the surface. A laser beam is directed toward a target region of the coated surface, traveling first through the object's entry surface and body, which are translucent or transparent to the wavelength of light contained in the laser beam. The laser beam generates a plasma shock wave at the target region of the coated surface, thereby discharging particles of the coating located near the target region. The discharged printed matter is discharged away from the object, thereby avoiding undesired impregnation of the coating into the object. Discharged coating may be recycled by collection and subsequent reuse.

REFERENCES:
patent: 3787210 (1974-01-01), Roberts
patent: 4803021 (1989-02-01), Werth et al.
patent: 5166041 (1992-11-01), Murofushi et al.

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