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US 11,229,866 B2Granted
Air filter, light source device, and air filter manufacturing method
AssigneeHamamatsu Photonics K.K.
InventorsKyoichi Murayama, Ryotaro Matui, Yasumasa Hakamata, Koji Maejima
Life of this patent
Estimating the term…
Abstract
An air filter includes a first urethane portion made of polyurethane foam and having air permeability and a second urethane portion made of polyurethane foam and disposed so as to overlap with a part of the first urethane portion. The second urethane portion is higher in density than the first urethane portion. The first urethane portion and the second urethane portion are integrated with each other in a state where the second urethane portion is incorporated in the part of the first urethane portion.
Claims14
An air filter comprising:
- a first urethane portion made of polyurethane foam and having air permeability;
- and
- a second urethane portion made of polyurethane foam and disposed so as to overlap with a part of the first urethane portion, wherein
- the second urethane portion is higher in density than the first urethane portion, and
- the first urethane portion and the second urethane portion are integrated with each other in a state where the second urethane portion is incorporated in the part of the first urethane portion.
2 more elements
An air filter manufacturing method comprising:
- an overlapping step of overlapping a first urethane member made of polyurethane foam and having air permeability and a second urethane member made of polyurethane foam and higher in density than the first urethane member with each other such that the second urethane member overlaps a part of the first urethane member;
- and
- an integration step of integrating the first urethane member and the second urethane member with each other by thermocompression bonding after the overlapping step, in a state where the second urethane portion is incorporated in the part of the first urethane portion.
Dependencies are inferred from the claim text.