Abstract Writing implement comprising a barrel including in its interior a front compartment and an ink reservoir separated from the front compartment by a partition, a nib projecting from the front compartment and made of a fibrous material, an ink absorbing member including a liquid-absorbent rodlike core covered with a non-absorbent material around its peripheral surface other than the opposite ends thereof, at least one compartment provided at the rearmost portion of the barrel and having a smaller capacity than the ink reservoir, and a passage for permitting the ink reservoir to communicate with the rearmost compartment. The ink absorbing member extends through the ink reservoir in the interior of the barrel, with its opposite ends positioned in the front compartment and the rearmost compartment respectively. The front compartment is supplied with ink only from the rearmost compartment through the core of the ink absorbing member by capillary action thereof and ink is then fed to the nib for writing. When drained of ink, the rearmost compartment can be replenished with ink from the ink reservoir.
Inventors
👤 Nobutaka Saito
Bibliographic Details
Application Number—
JurisdictionUS
Data Sourcegoogle_patents
Last Synchronized2026-11-09 21:16
CPC Classifications
B; B43; B43K; B43K8/00; B43K8/02; B43K8/003
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
145 words
A writing implement comprising a barrel including in its interior a front compartment and an ink reservoir separated from the front compartment by a partition, a fibrous material nib projecting from the front compartment, an ink absorbing member including a liquid-absorbent rod-like core and a non-absorbent material surrounding the peripheral surface thereof parallel to the longitudinal axis of the core, at least one compartment provided at the rearmost portion of the barrel and having a smaller capacity than the ink reservoir, and a passage means for connecting the ink reservoir with the rearmost compartment, wherein the ink absorbing member is positioned in the interior of the barrel with the non-absorbent material separating the core from the reservoir, one end of the ink absorbing member being positioned in the front compartment and the oTher end of the ink absorbing member being position in the rearmost compartment.
Claim 2
Dependent Claim
145 words
A writing implement comprising a barrel including in its interior a front compartment and an ink reservoir separated from the front compartment by a partition, a fibrous material nib projecting from the front compartment, an ink absorbing member including a liquid-absorbent rod-like core and a non-absorbent material surrounding the peripheral surface thereof parallel to the longitudinal axis of the core, at least one compartment provided at the rearmost portion of the barrel and having a smaller capacity than the ink reservoir, and a passage means for connecting the ink reservoir with the rearmost compartment, wherein the ink absorbing member is positioned in the interior of the barrel with the non-absorbent material separating the core from the reservoir, one end of the ink absorbing member being positioned in the front compartment and the oTher end of the ink absorbing member being position in the rearmost compartment.
Claim 3
Dependent Claim
15 words
The writing implement as set forth in claim 1 wherein the passage means is helical.
Claim 4
Dependent Claim
19 words
The writing implement as set forth in claim 1 wherein the ink absorbing member has a bore extending therethrough.
Claim 5
Dependent Claim
31 words
The writing implement as set forth in claim 1 wherein the partition is rendered permeable to air but impermeable to ink, and the front compartment is provided with an air passage.