Copier and printer toner hopper sealing device

A sealing means for sealing a toner hopper used in printer or copying machine toner cartridges, in order that used toner cartridges can be refilled with toner, sealed, and transported with little possibility of spilling any of the toner from the toner hopper, said toner hopper having an opening through which toner flows, said sealing means comprising a seal-insert and slide-seal, wherein said seal-insert comprises separate pieces fastened into one component by a joining means such that there are outer pieces and a middle piece sandwiched between said outer pieces, said outer pieces having corresponding slots and said middle piece having a slot wider than said slots in said outer pieces and being open at one end, said slots in said outer and middle pieces being aligned such that a passage is formed through said seal-insert, said slide-seal comprising a strip of material that may be slid through the open end of said slot in said middle piece, blocking said passage in said seal-insert, so that when said seal-insert is attached to the toner hopper over said toner hopper opening, said slide-seal would provide a reusable seal blocking or allowing toner flow through said toner hopper opening and through said seal-insert passage.