This inventor holds 3 USPTO granted patents. Top assignees: Hitachi Maxell, Limited, Hitachi, Ltd.. Active years: 1987-1988.
Company Filing History:
3 out of 1,112 
1 out of 42,726 
Years Active: 1987-1988
Title: Sigeo Sasaki: Innovator in Tape Cartridge Technology
Introduction
Sigeo Sasaki is a notable inventor based in Kyoto, Japan. He has made significant contributions to the field of tape cartridge technology, holding a total of 3 patents. His innovative designs focus on reducing modulation noise and enhancing the functionality of tape cartridges.
Latest Patents
One of Sasaki's latest patents is a tape cartridge case composition designed to reduce modulation noise. This invention features a cartridge case made from a complex plastic material, specifically polyolefin resin, mixed with a filler that comprises 45 percent to 65 percent by weight of the plastic material. The filler includes particles made of calcium carbonate and barium sulfate. This design allows the tape cartridge to have a dynamic loss of more than 1.times.10.sup.9 dyne/cm.sup.2 within a frequency range of 0.1 Hz to 1000 Hz. As a result, the cartridge effectively prevents the running tape from oscillating, thereby attenuating outside oscillation and reducing modulation noise.
Another patent by Sasaki involves a tape cartridge that features a pocket for drawing out a recording tape for loading. This design includes a shutter that is slidably mounted on the bottom portion of the cartridge, which opens and closes the bottom opening of the pocket. Additionally, the shutter has a series of ribs extending in a frontward and backward direction on its inner face, ensuring a smooth sliding movement.
Career Highlights
Sigeo Sasaki has worked with prominent companies such as Hitachi Maxell, Limited and Hitachi, Ltd. His experience in these organizations has allowed him to refine his skills and contribute to advancements in tape technology.
Collaborations
Throughout his career, Sasaki has collaborated with notable coworkers, including Takashi Sumida and Takao Ketori. These partnerships have likely played a role in the development of his innovative patents.
Conclusion
Sigeo Sasaki's contributions to tape cartridge technology demonstrate his commitment to innovation and excellence. His patents reflect a deep understanding of materials and design, making a significant impact in the industry.