| 主权项 |
1. A sheet holder for holding at least one sheet, said sheet holder comprising:
a housing, said housing defining first and second side walls, said first and second side walls being spaced apart from each other and defining a substantially elongated slot therebetween, said slot defining a slot longitudinal axis and slot top and bottom ends substantially transversely opposed relative to each other, said first and second side walls also defining a bottom aperture leading into said slot at said slot bottom end, said housing also defining a plurality of guiding grooves in said first side wall, each of said guiding grooves facing said slot and defining substantially opposed groove top and bottom ends, said guiding grooves extending further away from said second side wall substantially adjacent said groove top end than substantially adjacent said groove bottom end; and a plurality of holding elements, each of said holding elements being at least partially received in a respective one of said guiding grooves and movable therealong between said groove top and bottom ends, said holding elements being configured and sized so that when said holding elements abut against said second side wall, at least part of said holding elements remains in said guiding grooves at all positions therealong; whereby, when said sheet holder is positioned vertically with said slot bottom end below said slot top end and at least part of said at least one sheet is inserted in said slot, said holding elements move towards said groove bottom ends in said guiding grooves and pinch said at least one sheet between said holding elements and second side wall to hold said at least one sheet in said slot. |
