Providing erasable printing with nanoparticles

• US 8,289,352 B2
• Filed: 07/15/2010
• Issued: 10/16/2012
• Est. Priority Date: 07/15/2010
• Status: Active Grant

• Current Assignee: Tamiras Per Pte Ltd LLC (Intellectual Ventures LLC)
• Original Assignee: HJ Laboratories, LLC
• Inventors: Vartanian, Harry, Jurikson-Rhodes, Jaron
• Primary Examiner(s): Meier, Stephen
• Assistant Examiner(s): Witkowski, Alexander C
• Application Number:
  US12/837,170
• Publication Number:
  US 20120013695A1
• Time in Patent Office: 824 Days
• Field of Search: 347/110
• US Class Current: 347/110
• CPC Class Codes: B41J 2/00 Typewriters or selective printing mechanisms characterised by the printing or marking process for which they are designed mounting, arrangement or disposition of types or dies B41J1/00
• CPC Class Codes: B41J 3/4076 printing on rewritable, bistable "electronic paper" by a focused electric or magnetic field

Abstract

An apparatus and method for providing rewritable or erasable printing or copying that utilizes nanoparticle ink or toner is disclosed. A paper-like material is described using nanoparticles that are selectively controlled to show a substantially dark, gray, or white dot depending on an emitted signal or field in a printer or copier device. Also disclosed is a printer or copier device that erases and writes nanoparticles to a paper-like material depending on an emitted magnetic signal in a printer or copier device.

Claims

1. A method of erasable printing by a printing device, the method comprising:

applying nanoparticle toner and printing a dot by the printing device on plain paper; and

erasing, subsequently, the dot by emitting a signal or field by the printing device to change an orientation of portions of the applied nanoparticle toner on the plain paper.

3. The method of claim 1 further comprising:

emitting, subsequently by the printing device, another signal or field to the portions of the applied nanoparticle toner on the plain paper to change a state to further erase the dot on the plain paper.

4. The method of claim 1 further comprising:

emitting, subsequently by the printing device, another signal or field to the portions of the applied nanoparticle toner on the plain paper to change an orientation to rewrite another dot on the plain paper.

5. The method of claim 1 further comprising:

emitting, subsequently by the printing device, another signal or field to the portions of the applied nanoparticle toner on the plain paper to change an orientation and remove the nanoparticle toner from the plain paper.

6. The method of claim 1 further comprising:

erasing pre-applied nanoparticle toner on the plain paper by the printing device.

2. A printing device configured for erasable printing comprising:

the printing device configured to apply nanoparticle toner and print a dot on plain paper; and

wherein the dot is subsequently erased by the printing device by emission of a signal or field to change an orientation of protions of the applied nanoparticle toner on the plain paper.

7. The printing device of claim 2 further comprising:

the printing device configured to emit, subsequently, another signal or field to the portions of the applied nanoparticle toner on the plain paper to change a state to further erase the dot on the plain paper.

8. The printing device of claim 2 further comprising:

the printing device configured to emit, subsequently, another signal or field to the portions of the applied nanoparticle toner on the plain paper to change an orientation to rewrite another dot on the plain paper.

9. The printing device of claim 2 further comprising:

the printing device configured to emit, subsequently, another signal or field to the portions of the applied nanoparticle toner on the plain paper to change an orientation and remove the nanoparticle toner from the plain paper.

10. The printing device of claim 2 further comprising:

the printing device configured to erase pre-applied nanoparticle toner on the plain paper.