A trim cover 5 capable of vending and deforming together with the sheet resilient material by pressure of a body of a sitting passenger is stretched within the frame of the frame body such as to face a front surface side of the sheet resilient material 2. With this structure, it is possible to suppress...http://www.google.sh/patents/US6152534?utm_source=gb-gplus-sharePatent US6152534 - Seat having seating face made of sheet resilient material
