US4777498A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Image forming apparatus
Assignee: Canon Inc
•
Filing: 1986-05-06
•
Granted: 1988-10-11
•
Expires: 2006-05-06
Abstract
Abstract An image forming apparatus such as a copying apparatus and a laser beam printer, is capable of forming a superimposed image or duplex image on one sheet. The sheet which has been once subjected to the image forming operation and which is going to be subjected to another image forming operation is reintroduced into the image forming station selectively through a flow-through sheet passage or through an intermediate tray on which the transfer sheets are once stacked. A displaceable flapper is provided to direct the sheet selectively to the flow-through passage or to the intermediate tray.
Inventors
- 👤 Toshirou Kasamura
- 👤 Takashi Ozawa
- 👤 Yasuyoshi Yamamoto
- 👤 Masashi Ohashi
- 👤 Akiyoshi Kimura
- 👤 Nobukazu Sasaki
- 👤 Michiro Koike
- 👤 Atsushi Kubota
- 👤 Tatsuya Shiratori
- 👤 Toshihiko Kusumoto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 12:10
CPC Classifications
G; G03; G03G; G03G15/00; G03G15/65; G03G15/6555; G03G15/6579; G03G15/22; G03G15/23; G03G15/231; G03G15/232; G03G15/234; G03G2215/00; G03G2215/00362; G03G2215/00367; G03G2215/00417; G03G2215/0043; G03G2215/00434; G03G2215/00535; G03G2215/00556; G03G2215/00578; G03G2215/00586; G03G2215/00675
Claims Analysis
Total Claims: 51
Claim 1
Independent Claim
176 words
An image forming apparatus for forming images on a sheet plural times, comprising: an image forming station for forming an image; sheet refeeding means for refeeding to said image formation station a sheet which has been subjected to an image forming operation of said image forming station; sheet stacking means for stacking the sheet which has been subjected to the image forming operation of said image forming station for subsequent refeeding toward said image forming station; and displaceable switching means for selectively introducing the sheet to said sheet refeeding means and to said stacking means, wherein said stacking means includes tray means extending generally along a refeeding direction of the sheet for stacking a sheet introduced thereto by said switching means, feed means for feeding a sheet stacked on said tray means by advancing the sheet generally toward the direction from which the sheet was introduced to said tray means, and a sheet path for guiding the sheet fed by said feed means to said sheet refeeding means while inverting the facing orientation of the sheet.
Claim 2
Dependent Claim
176 words
An image forming apparatus for forming images on a sheet plural times, comprising: an image forming station for forming an image; sheet refeeding means for refeeding to said image formation station a sheet which has been subjected to an image forming operation of said image forming station; sheet stacking means for stacking the sheet which has been subjected to the image forming operation of said image forming station for subsequent refeeding toward said image forming station; and displaceable switching means for selectively introducing the sheet to said sheet refeeding means and to said stacking means, wherein said stacking means includes tray means extending generally along a refeeding direction of the sheet for stacking a sheet introduced thereto by said switching means, feed means for feeding a sheet stacked on said tray means by advancing the sheet generally toward the direction from which the sheet was introduced to said tray means, and a sheet path for guiding the sheet fed by said feed means to said sheet refeeding means while inverting the facing orientation of the sheet.
Claim 3
Dependent Claim
208 words
An image forming apparatus for forming images on a sheet plural times, comprising: an image forming station for forming an image; sheet refeeding means for refeeding to said image forming station a sheet which has been subjected to an image forming operation of said image forming station when in a single mode, wherein plural image formations are effected on a single sheet; sheet stacking means for stacking the sheet which has been subjected to the image forming operation of said image forming station for subsequent refeeding toward said imge forming station when in a repeating mode, wherein the plural image formations are effected on each of plural sheets; and displaceable switching means for selectively introducing the sheet to said sheet refeeding means and to said stacking means, wherein said stacking means includes tray means extending generally along a refeeding direction of the sheet for stacking a sheet introduced thereto by said switching means, feed means for feeding a sheet stacked on said tray means by advancing the sheet generally toward the direction from which the sheet was introduced to said tray means, and a sheet path for guiding the sheet fed by said feed means to said sheet refeeding means while inverting the facing orientation of the sheet.
Claim 4
Dependent Claim
208 words
An image forming apparatus for forming images on a sheet plural times, comprising: an image forming station for forming an image; sheet refeeding means for refeeding to said image forming station a sheet which has been subjected to an image forming operation of said image forming station when in a single mode, wherein plural image formations are effected on a single sheet; sheet stacking means for stacking the sheet which has been subjected to the image forming operation of said image forming station for subsequent refeeding toward said imge forming station when in a repeating mode, wherein the plural image formations are effected on each of plural sheets; and displaceable switching means for selectively introducing the sheet to said sheet refeeding means and to said stacking means, wherein said stacking means includes tray means extending generally along a refeeding direction of the sheet for stacking a sheet introduced thereto by said switching means, feed means for feeding a sheet stacked on said tray means by advancing the sheet generally toward the direction from which the sheet was introduced to said tray means, and a sheet path for guiding the sheet fed by said feed means to said sheet refeeding means while inverting the facing orientation of the sheet.
Claim 5
Dependent Claim
27 words
An apparatus according to claim 2, wherein said sheet refeeding means includes a conveying roller for stopping the sheet and rotating in response to a conveying signal.
Claim 6
Dependent Claim
124 words
An image forming apparatus for forming images on a sheet plural times, comprising: an image forming station for forming an image; sheet refeeding means for refeeding to said image forming station a sheet which has been subjected to an image forming operation of said image forming station; sheet stacking and feeding means for stacking the sheet which has been subjected to the image forming operation of said image forming station and subsequently refeeding the sheet toward said image forming station; and displaceable switching means for selectively introducing the sheet refeeding means and to said stacking means, wherein said sheet stacking and feeding means is a single, self-contained unit detachably mountable to a main assembly of the image forming apparatus containing said sheet refeeding means.
Claim 7
Dependent Claim
124 words
An image forming apparatus for forming images on a sheet plural times, comprising: an image forming station for forming an image; sheet refeeding means for refeeding to said image forming station a sheet which has been subjected to an image forming operation of said image forming station; sheet stacking and feeding means for stacking the sheet which has been subjected to the image forming operation of said image forming station and subsequently refeeding the sheet toward said image forming station; and displaceable switching means for selectively introducing the sheet refeeding means and to said stacking means, wherein said sheet stacking and feeding means is a single, self-contained unit detachably mountable to a main assembly of the image forming apparatus containing said sheet refeeding means.
Claim 8
Dependent Claim
50 words
An apparatus according to claim 2, further comprising sheet inverting means for inverting the facing orientation of a sheet which has been subjected to the image forming operation of said image forming station and for introducing the sheet either to said sheet refeeding means or to said sheet stacking means.
Claim 9
Dependent Claim
50 words
An apparatus according to claim 2, further comprising transporting means for receiving the sheet which has been subjected to the image forming operation of said image forming station and for introducing the sheet without inverting its facing orientation either to said sheet refeeding means or to said sheet stacking means.
Claim 10
Dependent Claim
111 words
An apparatus according to claim 1, further comprising sheet inverting means for inverting the facing orientation of a sheet which has been subjected to the image forming operation of said image forming station and for introducing the sheet either to said sheet refeeding means or to said sheet stacking means, sheet transporting means for receiving the sheet which has been subjected to the image forming operation of said image forming station and introducing the sheet without inverting its facing orientation either to said sheet refeeding means or to said sheet stacking means, and switching means for selectively introducing the sheet to said sheet inverting means or to said sheet transporting means.
Claim 11
Dependent Claim
24 words
An apparatus according to claim 7, wherein said sheet refeeding means includes a sheet passage effective to invert the sheet in its facing orientation.
Claim 12
Dependent Claim
81 words
An apparatus according to claim 8, wherein the sheet is introduced to said sheet refeeding means through sheet reversing means when in a single superimposed mode, wherein the image forming operation is effected plural times on one side of a single sheet, and the sheet is introduced to said sheet stacking means through sheet transporting means without a sheet inverting function when in a repeated superimposed mode, wherein plural image formations are effected on one side of each of plural sheets.
Claim 13
Dependent Claim
64 words
An apparatus according to claim 8, wherein the sheet is introduced to said sheet refeeding means through sheet transporting means without inverting the sheet when in a single duplex mode, wherein a single duplex image is formed, and the sheet is introduced to said sheet stacking means through said sheet inverting means when in a repeated duplex mode, wherein plural duplex images are formed.
Claim 14
Dependent Claim
210 words
An image forming apparatus for forming images on a sheet plural times, comprising: an image forming station for forming an image; sheet refeeding means for refeeding to said image forming station a sheet which has been subjected to an image forming operation of said image forming station; sheet stacking means for stacking the sheet which has been subjected to the image forming operation of said image forming station for subsequent refeeding toward said image forming station; and switching means for selectively introducing the sheet to said sheet refeeding means when in a single mode, wherein plural image forming operations are effected on a single sheet, and to said sheet stacking means when in a repeated mode, wherein the plural image forming operations are effected on each of plural sheets, wherein said stacking means includes tray means extending generally along a refeeding direction of the sheet for stacking a sheet introduced thereto by said switching means, feed means for feeding a sheet stacked on said tray means by advancing the sheet generally toward the direction from which the sheet was introduced to said tray means and a sheet path for guiding the sheet fed by said feed means to said sheet refeeding means while inverting the facing orientation of the sheet.
Claim 15
Dependent Claim
210 words
An image forming apparatus for forming images on a sheet plural times, comprising: an image forming station for forming an image; sheet refeeding means for refeeding to said image forming station a sheet which has been subjected to an image forming operation of said image forming station; sheet stacking means for stacking the sheet which has been subjected to the image forming operation of said image forming station for subsequent refeeding toward said image forming station; and switching means for selectively introducing the sheet to said sheet refeeding means when in a single mode, wherein plural image forming operations are effected on a single sheet, and to said sheet stacking means when in a repeated mode, wherein the plural image forming operations are effected on each of plural sheets, wherein said stacking means includes tray means extending generally along a refeeding direction of the sheet for stacking a sheet introduced thereto by said switching means, feed means for feeding a sheet stacked on said tray means by advancing the sheet generally toward the direction from which the sheet was introduced to said tray means and a sheet path for guiding the sheet fed by said feed means to said sheet refeeding means while inverting the facing orientation of the sheet.
Claim 16
Dependent Claim
27 words
An apparatus according to claim 11, wherein said sheet refeeding means includes a conveying roller for stopping the sheet and rotating in response to a conveying signal.
Claim 17
Dependent Claim
15 words
An apparatus according to claim 4, wherein said switching means is contained in said unit.
Claim 18
Dependent Claim
50 words
An apparatus according to claim 11, further comprising sheet inverting means for inverting the facing orientation of a sheet which has been subjected to the image forming operation of said image forming station and for introducing the sheet either to said sheet refeeding means or to said sheet stacking means.
Claim 19
Dependent Claim
50 words
An apparatus according to claim 11, further comprising transporting means for receiving the sheet which has been subjected to the image forming operation of said image forming station and for introducing the sheet without inverting its facing orientation either to said sheet refeeding means or to said sheet stacking means.
Claim 20
Dependent Claim
111 words
An apparatus according to claim 11, further comprising sheet inverting means for inverting the facing orientation of a sheet which has been subjected to the image forming operation of said image forming station and for introducing the sheet either to said sheet refeeding means or to said sheet stacking means, sheet transporting means for receiving the sheet which has been subjected to the image forming operation of said image forming station and introducing the sheet without inverting its facing orientation either to said sheet refeeding means or to said sheet stacking means, and switching means for selectively introducing the sheet to said sheet inverting means or to said sheet transporting means.
Claim 21
Dependent Claim
44 words
An apparatus according to claim 4, wherein when images are to be formed on plural sheets, said switching means introduces the first sheet to said sheet refeeding means and introduces the second and subsequent sheets, if any, to said sheet stacking and feeding means.
Claim 22
Independent Claim
27 words
An apparatus according to any one of claims 11, 12 and 14-16, wherein said sheet path is connected with said sheet refeeding means through said switching means.
Claim 23
Dependent Claim
186 words
An image forming apparatus for forming images on a sheet plural times, comprising: an image forming station for forming an image; sheet refeeding means for refeeding to said image forming station a first sheet which has been subjected to an image forming operation of said image forming station when in a repeated mode, wherein plural image forming operations are effected on each of plural sheets; and sheet stacking means for stacking a second and subsequent sheet, if any, which has been subjected to the image forming operation of said image forming station for subsequent refeeding toward said image forming station when in the repeated mode, wherein said stacking means includes tray means extending generally along a refeeding direction of the sheet for stacking a sheet introduced thereto by said switching means, feed means for feeding a sheet stacked on said tray means by advancing the sheet generally toward the direction from which the sheet was introduced to said tray means and a sheet path for guiding the sheet fed by said feed means to said sheet refeeding means while inverting the facing orientation of the sheet.
Claim 24
Dependent Claim
186 words
An image forming apparatus for forming images on a sheet plural times, comprising: an image forming station for forming an image; sheet refeeding means for refeeding to said image forming station a first sheet which has been subjected to an image forming operation of said image forming station when in a repeated mode, wherein plural image forming operations are effected on each of plural sheets; and sheet stacking means for stacking a second and subsequent sheet, if any, which has been subjected to the image forming operation of said image forming station for subsequent refeeding toward said image forming station when in the repeated mode, wherein said stacking means includes tray means extending generally along a refeeding direction of the sheet for stacking a sheet introduced thereto by said switching means, feed means for feeding a sheet stacked on said tray means by advancing the sheet generally toward the direction from which the sheet was introduced to said tray means and a sheet path for guiding the sheet fed by said feed means to said sheet refeeding means while inverting the facing orientation of the sheet.
Claim 25
Dependent Claim
27 words
An apparatus according to claim 19, wherein said sheet refeeding means includes a conveying roller for stopping the sheet and rotating in response to a conveying signal.
Claim 26
Dependent Claim
30 words
An apparatus according to claim 4, wherein said sheet stacking and feeding means is used in a repeated mode wherein plural image formation is effected on each of plural sheets.
Claim 27
Dependent Claim
50 words
An apparatus according to claim 19, further comprising sheet inverting means for inverting the facing orientation of a sheet which has been subjected to the image forming operation of said image forming station and for introducing the sheet either to said sheet refeeding means or to said sheet stacking means.
Claim 28
Dependent Claim
50 words
An apparatus according to claim 19, further comprising transporting means for receiving the sheet which has been subjected to the image forming operation of said image forming station and for introducing the sheet without inverting its facing orientation either to said sheet refeeding means or to said sheet stacking means.
Claim 29
Dependent Claim
112 words
An apparatus according to claim 19, further comprising a sheet inverting means for inverting the facing orientation of a sheet which has been subjected to the image forming operation of said image forming station and for introducing the sheet either to said sheet refeeding means or to said sheet stacking means, sheet transporting means for receiving the sheet which has been subjected to the image forming operation of said image forming station and introducing the sheet without inverting its facing orientation either to said sheet refeeding means or to said sheet stacking means, and switching means for selectively introducing the sheet to said sheet inverting means or to said sheet transporting means.
Claim 30
Dependent Claim
24 words
An apparatus according to claim 24, wherein said sheet refeeding means includes a sheet passage effective to invert the sheet in its facing orientation.
Claim 31
Dependent Claim
131 words
An apparatus according to claim 25, wherein the sheet is introduced to said sheet refeeding means through sheet reversing means when in a single superimposed mode, wherein the image forming operation is effected plural times on one side of a single sheet, a first sheet is introduced to said sheet refeeding means through said sheet reversing means when in a repeated superimposed mode, wherein the plural image formations are effected on one side of each of plural sheets, the sheet is introduced to said sheet stacking means through sheet transporting means without a sheet inverting function when in the repeated superimposed mode, and second and subsequent sheets, if any, are introduced to said sheet stacking means through sheet transporting means without a sheet inverting function when in the repeated superimposed mode.
Claim 32
Dependent Claim
113 words
An apparatus according to claim 25, wherein the sheet is introduced to said sheet refeeding means through sheet transporting means without inverting the sheet when in a single duplex mode, wherein a single duplex image is formed, a first sheet is introduced to said sheet refeeding means through sheet transporting means without inverting the sheet when in a repeated duplex mode, wherein plural duplex images are formed, and the sheet is introduced to said sheet stacking means through said sheet inverting means when in the repeated duplex mode and second and subsequent sheets, if any, are introduced to said sheet stacking means through said sheet inverting means when in the repeated duplex mode.
Claim 33
Dependent Claim
184 words
An image forming apparatus for forming images on a sheet plural times, comprising: an image forming station for forming an image; sheet refeeding means for refeeding to said image forming station a sheet which has been subjected to an image forming operation of said image forming station; sheet stacking means for stacking the sheet which has been subjected to the image forming operation of said image forming station for subsequent refeeding toward said image forming station; and switching means for introducing the first sheet to said sheet refeeding means and introducing the second and subsequent sheets, if any, to said sheet stacking means, wherein said stacking means includes tray means extending generally along a refeeding direction of the sheet for stacking a sheet introduced thereto by said switching means, feed means for feeding a sheet stacked on said tray means by advancing the sheet generally toward the direction from which the sheet was introduced to said tray means, and a sheet path for guiding the sheet fed by said feed means to said sheet refeeding means while inverting the facing orientation of the sheet.
Claim 34
Dependent Claim
184 words
An image forming apparatus for forming images on a sheet plural times, comprising: an image forming station for forming an image; sheet refeeding means for refeeding to said image forming station a sheet which has been subjected to an image forming operation of said image forming station; sheet stacking means for stacking the sheet which has been subjected to the image forming operation of said image forming station for subsequent refeeding toward said image forming station; and switching means for introducing the first sheet to said sheet refeeding means and introducing the second and subsequent sheets, if any, to said sheet stacking means, wherein said stacking means includes tray means extending generally along a refeeding direction of the sheet for stacking a sheet introduced thereto by said switching means, feed means for feeding a sheet stacked on said tray means by advancing the sheet generally toward the direction from which the sheet was introduced to said tray means, and a sheet path for guiding the sheet fed by said feed means to said sheet refeeding means while inverting the facing orientation of the sheet.
Claim 35
Dependent Claim
27 words
An apparatus according to claim 28, wherein said sheet refeeding means includes a conveying roller for stopping the sheet and rotating in response to a conveying signal.
Claim 36
Dependent Claim
92 words
An apparatus according to claim 4, wherein said sheet stacking and feeding means includes tray means extending generally along a refeeding direction of the sheet for stacking a sheet introduced thereto by said switching means, feed means for feeding the sheet stacked on said stacking means by advancing the sheet generally in the direction from which the sheet was introduced to said tray means and a sheet path for guiding the sheet fed by said feed means to said sheet refeeding means while inverting the sheet the facing orientation of the sheet.
Claim 37
Dependent Claim
50 words
An apparatus according to claim 28, further comprising sheet inverting means for inverting the facing orientation of a sheet which has been subjected to the image forming operation of said image forming station and for introducing the sheet either to said sheet refeeding means or to said sheet stacking means.
Claim 38
Dependent Claim
50 words
An apparatus according to claim 28, further comprising transporting means for receiving the sheet which has been subjected to the image forming operation of said image forming station and for introducing the sheet without inverting its facing orientation either to said sheet refeeding means or to said sheet stacking means.
Claim 39
Dependent Claim
110 words
An apparatus according to claim 28, further comprising sheet inverting means for inverting facing orientation of a sheet which has been subjected to the image forming operation of said image forming station and for introducing the sheet either to said sheet refeeding means or to said sheet stacking means, sheet transporting means for receiving the sheet which has been subjected to the image forming operation of said image forming station and introducing the sheet without inverting its facing orientation either to said sheet refeeding means or to said sheet stacking means, and switching means for selectively introducing the sheet to said sheet inverting means or to said sheet transporting means.
Claim 40
Independent Claim
29 words
An apparatus according to any one of claims 28, 29 and 31-33, further comprising a sensor for sensing passage of the sheet and effecting operation of said switching means.
Claim 41
Dependent Claim
97 words
An apparatus according to claim 30, further comprising sheet inverting means for inverting the facing orientation of a sheet which has been subjected to the image forming operation of said image forming station and for introducing the sheet either to said sheet refeeding means or to said sheet stacking and feeding means, and transporting means for receiving the sheet which has been subjected to the image forming operation of said image forming station and for introducing the sheet without inverting its facing orientation either to said sheet refeeding means or to said sheet stacking and feeding means.
Claim 42
Independent Claim
27 words
An apparatus according to any one of claims 28, 29 and 31-33, wherein said sheet path is connected with said sheet refeeding means through said switching means.
Claim 43
Dependent Claim
142 words
An apparatus according to claim 35, wherein the sheet is introduced to said sheet refeeding means through sheet reversing means when in a single superimposed mode, wherein the image forming operation is effected plural times on one side of a single sheet, the sheet is introduced to said sheet stacking and feeding means through sheet transporting means without a sheet inverting function when in a repeated superimposed mode, wherein plural image formations are effected on one side of each of plural sheets, the sheet is introduced to said sheet refeeding means through said sheet transporting means without inverting the sheet when in a single duplex mode, wherein a single duplex image is formed, and the sheet is introduced to said sheet stacking and feeding means through said sheet inverting means when in a repeated duplex mode, wherein plural duplex images are formed.
Claim 44
Dependent Claim
137 words
An apparatus according to claim 8, wherein the sheet is introduced to said sheet refeeding means through sheet reversing means when in a single superimposed mode, wherein the image forming operation is effected plural times on one side of a single sheet, the sheet is introduced to said sheet stacking means through sheet transporting means without a sheet inverting function when in a repeated superimposed mode, wherein plural image formations are effected on one side of each of plural sheets, the sheet is introduced to said sheet refeeding means through sheet transporting means without inverting the sheet when in a single duplex mode, wherein a single duplex image is formed, and the sheet is introduced to said sheet stacking means through said sheet inverting means when in a repeated duplex mode, wherein plural duplex images are formed.
Claim 45
Dependent Claim
18 words
An apparatus according to claim 38, wherein further comprising a discharging roller reversible to switch back the sheet.
Claim 46
Dependent Claim
25 words
An apparatus according to claim 38, wherein said switching means is disposed for guiding the sheet from said sheet path to said sheet refeeding means.
Claim 47
Dependent Claim
23 words
An apparatus according to claim 18, wherein an inlet path to said tray means and an outlet path from said tray means intersect.
Claim 48
Dependent Claim
238 words
An apparatus according to claim 25, wherein the sheet is introduced to said sheet refeeding means through sheet reversing means when in a single superimposed mode, wherein the image forming operation is effected plural times on one side of a sheet single, a first sheet is introduced to said sheet refeeding means through said sheet reversing means when in a repeated superimposed mode, wherein the plural image formations are effected on one side of each of plural sheets, the sheet is introduced to said sheet stacking means through sheet transporting means without a sheet inverting function when in the repeated superimposed mode, wherein second and subsequent sheets, if any, are introduced to said sheet stacking means through sheet transporting means without a sheet inverting function when in the repeated superimposed mode, the sheet is introduced to said sheet refeeding means through sheet transporting means without inverting the sheet when in a single duplex mode, wherein a single duplex image is formed, a first sheet is introduced to said sheet refeeding means through said sheet transporting means without inverting the sheet when in a repeated duplex mode, wherein plural duplex images are formed and, the sheet is introduced to said sheet stacking means through said sheet inverting means when in the repeated duplex mode, and second and subsequent sheets, if any, are introduced to said sheet stacking means through said sheet inverting means when in the repeated duplex mode.
Claim 49
Dependent Claim
48 words
An apparatus according to claim 19, wherein the first sheet is temporarily stopped in said refeeding means, the second and subsequent sheets are stacked on said tray means of said sheet stacking means, and after all sheets are stacked thereon, the sheets are refed from the first sheet.
Claim 50
Dependent Claim
15 words
An apparatus according to claim 34, wherein said sensor senses passage of the first sheet.
Claim 51
Dependent Claim
47 words
An apparatus according to claim 34, wherein the first sheet is temporarily stopped in said sheet refeeding means, the second and subsequent sheets are stacked on said tray means, and after all sheets are stacked on said tray means, the sheets are refed from the first sheet.
References Cited (Backward Citations)
US3227444A
Cited
US3672765A
Cited
DE1940284A1
Cited
US3615129A
Cited
US3869202A
Cited
US3999852A
Cited
US4218128A
Cited
JPS57186108A
Cited
US4453819A
Cited
DE3247142A1
Cited
US4537497A
Cited
JPS58111955A
Cited
JPS5915266A
Cited
US4660963A
Cited
USPTO Annuity & Maintenance Windows
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| 7.5 Years (Year 8) | 1995-10-11 | 1996-04-11 | 1996-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-10-11 | 2000-04-11 | 2000-10-11 | $7700.00 | Window Closed / Lapsed |