The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jun. 19, 1990
Filed:
Sep. 21, 1989
Applicant:
Inventor:
Mindy Hamlin, Oceanside, CA (US);
Assignee:
Hewlett-Packard Company, Palo Alto, CA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
G01D / ; G01F / ;
U.S. Cl.
CPC ...
3461 / ; 116227 ;
Abstract
An ink device (1) having means for determining the amount of ink remaining in an ink bag comprises a rigid, rectangular box (3) which has a window (29) in the top (13), a collapsible ink bag (23) in the container, one side of the ink bag being secured (33) to the corresponding side (9) of the container and the opposite side of the ink bag having a rigid plate or strip (19) secured to its lower half so that the top edge (21) of the plate is visible through the window. The container and the ink bag have cooperating means (17, 29) to allow ink (35) to flow into or out of the ink bag.