EP 0539747 B1 19940413 - Writing or drawing implement.
Title (en)
Writing or drawing implement.
Title (de)
Schreib- oder Zeichengerät.
Title (fr)
Instrument à écrire ou dessiner.
Publication
Application
Priority
DE 4135605 A 19911029
Abstract (en)
[origin: US5211495A] A writing or drawing instrument wherein a housing (1), is provided with a writing point (2) and a writing fluid reservoir (3) within an interior space of the housing. A capillary pressure equalization system (5), that connects the reservoir with the ambient air, has a sensor (7) therein for reacting to the level of writing fluid (4) therein. A suction pump (11, 12) is connected with the writing fluid reservoir (3) through a semi-permeable membrane (10) which lets air through and is impermeable for writing fluid (4). The suction pump (11, 12) is activated by the sensor (7) in response to a level of writing fluid (4) in the pressure equalization system, and aspirates air from the reservoir so as to quickly reduce an overpressure condition.
IPC 1-7
IPC 8 full level
B43K 8/02 (2006.01); B43K 5/18 (2006.01); B43K 8/22 (2006.01); B43K 29/08 (2006.01)
CPC (source: EP US)
B43K 5/189 (2013.01 - EP US); B43K 8/22 (2013.01 - EP US)
Designated contracting state (EPC)
AT BE CH DE DK ES FR GB GR IT LI LU NL SE
DOCDB simple family (publication)
EP 0539747 A1 19930505; EP 0539747 B1 19940413; AT E104217 T1 19940415; DE 4135605 A1 19930506; DE 59200118 D1 19940519; JP H05318979 A 19931203; JP H0796357 B2 19951018; US 5211495 A 19930518
DOCDB simple family (application)
EP 92116716 A 19920930; AT 92116716 T 19920930; DE 4135605 A 19911029; DE 59200118 T 19920930; JP 31271192 A 19921029; US 96270692 A 19921019