Indoor mail slot cover to prevent heat loss through mail slots

An indoor mail slot cover that can be reduced in size prior to installation in accordance with the size of said mail slot and that can seal said mail slot by covering said mail slot and a weather-stripping arrangement installed about said mail slot directly on a building structure or on a mail slot bezel plate attached to a building structure, said cover comprising:

• a plastic plate having:
• a cover flap portion sized to cover said mail slot;
• at least one transversely extending groove, located in at least said cover flap portion, said at least one transversely extending groove dividing said cover flap into a pair of adjacent sections;
• a lug portion, spaced from said cover flap portion and located directly opposite thereto for connecting said plate to said building structure, said lug portion having at least a pair of separable lug sections, each of which is located opposite to a said second of said cover flap portion;
• and
• a hinge portion located between said lug and said cover flap portions, said hinge portion comprising an integrally formed coined hinge having at least a pair of adjacent separable, hinge sections, each of which connects a said separable lug section to a said section of said cover flap portion;
• and
• means for attaching at least a said lug section to said building structure, whereby when prior to installation one of said adjacent sections of said cover flap portion is of sufficient size to fully cover said mail slot and said weather-stripping arrangement, the other of said adjacent sections of said cover flap portion, simultaneously with a said hinge section and a said lug section connected thereto, can be broken off along the line of said at least one transversely extending groove and then discarded to thereby reduce the size of said cover flap portion and leave the remaining of said adjacent sections thereof operable for pivotable movement with respect to said mail slot between an opened position, uncovering said mail slot and a closed position, covering said mail slot and said weather-stripping arrangement.