| 摘要 |
A fastener for securing first and second sheets of flexible material to a support comprises a channel member and a first retainer member having side portions adapted to fit inside the channel member for holding the first flexible sheet against opposed sides of the channel member. The first retainer member also provides an inner channel, and a second, inner retainer member is adapted to fit inside this inner channel for holding the second sheet of material between outer sides of the inner retainer member and side portions of the first retainer member. Removal of the second retainer member allows the second flexible sheet to be removed while the first flexible sheet remains in place. when the second retainer member is in place it provides an expansive force on the side portions of the first retainer member for enhanced gripping of the first flexible sheet.
|
