Title:
RESIDUAL INK AMOUNT DETECTION DEVICE
Document Type and Number:
Japanese Patent JPH05169679
Kind Code:
A
Abstract:
PURPOSE: To detect a residual ink amount in an ink containing bag on which an aluminum film is vapor deposited.
CONSTITUTION: An ink containing bag 1 is made of a flexible material where an aluminum film is vapor deposited partially or over the full surface thereof. A photointerruper 6 is composed of a light emitting element 6b and a light receiving element 6a. The photointerrupter 6 is mounted on a position where it can output a maximum power when exhaustion of ink causes the ink containing bag 1 to deflate to its maximum. The output signal of the light receiving element 6a is inputted to a detection circuit, where presence of ink is detected in accordance with the magnitude of the output signal.
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Inventors:
HIRATA TOSHITAKA
Application Number:
JP35585091A
Publication Date:
July 09, 1993
Filing Date:
December 20, 1991
Export Citation:
Assignee:
RICOH KK
International Classes:
G01F23/00; B41J2/175; (IPC1-7): B41J2/175; G01F23/00
Attorney, Agent or Firm:
Akinori Takano (1 person outside)