Seal for a toner cartridge assembly

a toner cartridge and assembly technology, applied in the field of sealing for toner cartridge assemblies, can solve the problems of extending into the passage of toner, film is also partly torn out, and the slot can be damaged, so as to prevent the loss or leakage of toner, prevent the loss of toner, and reduce the tearing force
USRE36920E1Inactive Publication Date: 2000-10-17BMT LIMITED
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Patents(United States)
Current Assignee / Owner
BMT LIMITED
Publication Date
2000-10-17
Estimated Expiration
Not applicable · inactive patent

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Abstract

A seal for a toner cartridge assembly used in printers, copy machines and facsimile machines. The seal is a strip which can be torn out so as to define an opening for the passage of toner. The strip has a structure which lowers the tearing force required when starting to tear the strip with respect to the tearing force required for other parts of the seal, or the seal has a structure which increases the binding of parts of the seal adjacent to the strip on the cartridge.
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Description

THE STATE OF THE ARTSeals in the form of a film comprising a strip which can be torn out have already been used in toner cartridge assembly of printers, copy machines and facsimile machines.Such seals are preferred with respect to the seals disclosed in U.S. Pat. No. 5,296,902 as in the latter seals, it is necessary to manufacture slotted seal inserts having a slot with very accurate dimensions. Furthermore, the film closing the slot is glued to the insert, whereby when peeling the film away from the slot, said slot can be damaged if the insert is not sufficiently rigid. The seals according to this U.S. patent are seals used to permit the recharging of a toner cartridge.Seals in the form of a film comprising a strip which can be torn out are often used for new cartridges, i.e. not for recharging toner cartridges. Recently, Applicant has proposed a seal of this kind suitable for recharging toner cartridges.The major drawback of these kind of seals is that when tearing the strip, ther...

Claims

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