Resources Contact Us Home
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
Dynamic message templates and messaging macros
Flash memory apparatus capable of extending data retention and improving data reliability, and method for controlling the same
Method, system and device for configuring topology or a wireless network
Multi-drive printed product processing device with verified feedback control
Hand-held device and method for detecting the spatial position of a working point of a manipulator
Mapping and reconstitution of a conformational discontinuous binding surface
  Randomly Featured Patents
Measuring device, sheet-shaped material transporting device, image formation device and measuring method
Embedded lamp and replaceable illumination module for the same
Automotive trim panel having dual density foam support layer
Technique for increasing the number of persistent consistency point images in a file system
Thermal compensation for optical apparatus
Quinoline derivative as diagnostic probe for disease with tau protein accumulation
Method for providing EMI/EMP hardening and breakdown protection in composite materials
Electrophotosensitive material and image forming method using the same
Analog to digital converter with a series of inverting elements
Press unit for a manufactured wood product press