Masahiko Kubo

Title: Masahiko Kubo: Innovator in Electrophotographic Toners

Introduction

Masahiko Kubo, based in Yao, Japan, is an accomplished inventor with a remarkable portfolio of 22 patents. His work primarily revolves around innovations in electrophotographic toners, making significant contributions to the field of imaging technology.

Latest Patents

Kubo's latest patents feature groundbreaking advancements in toner formulation. One notable invention is an electrophotographic toner that includes a polyester resin as the binder, coupled with a colorant. This polyester resin originates from the condensation of at least one polyhydric alcohol with a polybasic acid, specifically utilizing cyclohexanedimethanol. This invention boasts a loss modulus of 2×10 Pa to 3×10 Pa at 110°C when irradiated with laser light for fixing, achieving high-quality toner images with desired fastness and no white spots.

Another significant patent describes a toner's ability to incorporate even crystalline polyester while maintaining excellent fixing properties, chargeability, color reproducibility, and long-term stability. This patent also introduces a two-component developer, a developing device, and an image-forming apparatus. The toner comprises base particles containing a colorant and a binder resin that mix crystalline polyester and amorphous resin, adjusted to include 20% to 50% by weight of crystalline polyester for optimal performance.

Career Highlights

Throughout his career, Kubo has made impactful strides in the field of technology, especially in organizations like Mita Industrial Co., Ltd. and Sharp Kabushiki Kaisha Corporation. His expertise in materials and chemical engineering has significantly advanced the capabilities of electrophotographic toners.

Collaborations

Kubo's work has been bolstered by collaborations with notable coworkers such as Kazuo Fuji and Noriaki Tsubota. These partnerships have contributed to the successful development and commercialization of advanced imaging technologies.

Conclusion

Masahiko Kubo's innovations in electrophotographic toners have not only enhanced imaging quality but have also set new industry standards. With a robust patent portfolio and significant collaborations, he continues to shape the future of printing technology, making him a distinguished figure in his field.