Invention Grant
- Patent Title: Recording medium
- Patent Title (中): 录音媒体
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Application No.: US13023803Application Date: 2011-02-09
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Publication No.: US08236394B2Publication Date: 2012-08-07
- Inventor: Takatoshi Tanaka , Hiroshi Asakawa , Hitoshi Nagashima
- Applicant: Takatoshi Tanaka , Hiroshi Asakawa , Hitoshi Nagashima
- Applicant Address: JP Tokyo
- Assignee: Canon Kabushiki Kaisha
- Current Assignee: Canon Kabushiki Kaisha
- Current Assignee Address: JP Tokyo
- Agency: Fitzpatrick, Cella, Harper & Scinto
- Priority: JP2010-046402 20100303
- Main IPC: B41M5/00
- IPC: B41M5/00

Abstract:
A recording medium comprising a substrate and at least two porous ink receiving layers provided thereon of which a lower layer, second distant from the substrate, is arranged on the substrate side of an upper layer, most distant from the substrate. Pore distribution curves of the upper and lower layers respectively have one peak and two peaks. When pore radii giving the one peak and the two peaks are respectively regarded as R1 and R2, R3 where R2 is smaller than R3, R1 is 8 to 11 nm, R2 is 5 nm or more, R2 is smaller than R1, a difference between R1 and R2 is 2 nm or more, R3 is not less than R1, a difference between R3 and R1 is 3 nm or less. When pore volumes at the pore radii of R2 and R3 are respectively VR2 and VR3, a proportion VR2/VR3 is 0.8 to 2.4.
Public/Granted literature
- US20110217488A1 RECORDING MEDIUM Public/Granted day:2011-09-08
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