Patent US5079591A successfully refreshed from Google Patents.
US5079591A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Toner cartridge with an inner sack which is perforated when the cartridge is isnerted
Assignee: Ricoh Co Ltd
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Filing: 1990-06-07
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Granted: 1992-01-07
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Expires: 2010-06-07
Abstract
Abstract A developing apparatus operable with a toner cartridge having a flexible sack which is filled with a toner. When the toner cartridge is mounted on a developing tank included in the apparatus, the sack having been held under tension by the toner is perforated to form a hole therein. The hole causes the sack to contract rapidly due to its contactability while forcing the toner out of the sack. Then, the toner is dropped or otherwise auotmatically supplied into the developing tank. This allows the toner to be supplied without resorting to any extra manual operation after the toner cartridge has been mounted on the tank.
Inventors
- 👤 Satoru Tomita
- 👤 Takeshi Takemoto
- 👤 Tadaaki Kanno
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 05:55
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/06; G03G15/08; G03G15/0822; G03G15/0865; G03G15/0874; G03G15/0848; G03G15/0849; G03G15/0855; G03G2215/00; G03G2215/06; G03G2215/066; G03G2215/0682
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
203 words
A developing apparatus operable with a toner cartridge having a flexible sack which is fitted with a toner, comprising: a developing tank on which the toner cartridge is removably mounted, said toner cartridge comprising a casing having a side wall with an opening; and means for perforating and positioning said toner cartridge when said toner cartridge is mounted on said developing tank, said perforating and positioning means being integrally located on said toner cartridge casing and being movable from a first non-perforating and non-positioning position to a second position, when said toner cartridge is mounted on said developing tank, in which a portion of said perforating and positioning means extends through said opening to form a hole in the sack in order to supply the toner into said developing tank via said hole and position the toner mounted on said developing tank in a predetermined position; wherein, when said toner cartridge is mounted on said developing tank, said perforating and positioning means is urged to said second position by the inner periphery of said developing tank to form said hole and said toner cartridge is held in said predetermined position by friction created between said perforating and positioning means and said developing tank.
Claim 2
Dependent Claim
203 words
A developing apparatus operable with a toner cartridge having a flexible sack which is fitted with a toner, comprising: a developing tank on which the toner cartridge is removably mounted, said toner cartridge comprising a casing having a side wall with an opening; and means for perforating and positioning said toner cartridge when said toner cartridge is mounted on said developing tank, said perforating and positioning means being integrally located on said toner cartridge casing and being movable from a first non-perforating and non-positioning position to a second position, when said toner cartridge is mounted on said developing tank, in which a portion of said perforating and positioning means extends through said opening to form a hole in the sack in order to supply the toner into said developing tank via said hole and position the toner mounted on said developing tank in a predetermined position; wherein, when said toner cartridge is mounted on said developing tank, said perforating and positioning means is urged to said second position by the inner periphery of said developing tank to form said hole and said toner cartridge is held in said predetermined position by friction created between said perforating and positioning means and said developing tank.
Claim 3
Dependent Claim
90 words
The developing apparatus as claimed in claim 1, wherein said perforating and positioning means defines an arm portion which extends obliquely upward from an outer periphery of said casing in said first position, and a needle portion which protrudes from a free end of said arm portion toward the interior of said casing and substantially perpendicular to said arm portion in a direction toward said opening, such that when said perforating and positioning means is in said second position, said needle portion extends through said opening to form said hole.
Claim 4
Dependent Claim
81 words
The developing apparatus according to claim 1, wherein said perforating and positioning means defines a curved portion extending downward from an upper edge of an outer periphery of said casing and along said upper periphery, and a needle portion extending substantially horizontally from a free end of said curved portion toward the interior of said toner cartridge, such that when said perforating and positioning means is in said second position, said needle portion extends through said opening to form said hole.
Claim 5
Dependent Claim
19 words
The developing apparatus according to claim 1, wherein said perforating and positioning means is comprised of an elastic material.
References Cited (Backward Citations)
US4417802A
Cited
JPS58107560A
Cited
JPS5957263A
Cited
US4519693A
Cited
JPS59168469A
Cited
US4523834A
Cited
US4660960A
Cited
JPS6129870A
Cited
US4647180A
Cited
JPS632086A
Cited
JPS63187272A
Cited
US4766457A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1995-01-06 | 1995-07-08 | 1996-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1999-01-06 | 1999-07-08 | 2000-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2003-01-06 | 2003-07-08 | 2004-01-07 | $7700.00 | Window Closed / Lapsed |