Resources Contact Us Home
Browse by: INVENTOR PATENT HOLDER PATENT NUMBER DATE
 
 
Low-viscosity aqueous ink for a ball-point pen and a ball-point pen










Image Number 4 for United States Patent #5929135.

This invention provides a ball-point pen suited to low-viscosity aqueous ink. This ball-point pen includes a ball-point pen refill in which an ink reservoir communicates with a tip for holding a tip ball via a joint, wherein the ink reservoir is filled with water type ball-point pen ink containing at least one type of a solvent selected from the group consisting of ethyleneglycol, diethyleneglycol, propyleneglycol, and glycerin in an amount of 5 to 40 wt % of the total ink amount, a crosslinking acrylic acid polymer in an amount of 0.1 to 1.0 wt % of the total ink amount, a pigment in an amount of 5 to 10 wt % of the total ink amount, and the balance primarily consisting of water, and the tip has a spring which in a normal state urges and brings the tip ball into intimate contact with the inner edge of a ball holding portion at the front end of the tip and releases the intimate contact when writing is performed.








 
 
  Recently Added Patents
Nitrogen-doped carbon-supported cobalt-iron oxygen reduction catalyst
Food safety printer
Analogue-to-digital converter
Neurostimulation system
Switch redundancy in systems with dual-star backplanes
Systems and methods for analyzing telecommunications invoices for payment
Medical injector
  Randomly Featured Patents
Method for externally programming a device implanted in a patient
Byte-based method, process and algorithm for service-oriented and utility infrastructure usage measurement, metering, and pricing
High-clearance trailers for use in agricultural harvesting of multi-harvest crops
Antifungal and antibacterial susceptibility assay
Regulator
Method for fabrication of a quadrupole mass filter or quadrupole ion trap using electrode discharge machining
Rapamycin-resistant T cells and therapeutic uses thereof
Catheter with automatic needle guard
Thermal cracking of crude oil and crude oil fractions containing pitch in an ethylene furnace
Assays for sensory modulators using a sensory cell specific phospholipase C