US4922291A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sheet feed device
Assignee: Canon Inc
•
Filing: 1989-08-21
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Granted: 1990-05-01
•
Expires: 2009-08-21
Abstract
Abstract A sheet containing member releasably attachable to a main body of a sheet feed device is provided with a member arranged to limit a movement of the sheets from the sheet containing member so that the sheets do not drop out of the sheet containing member when the sheet containing member is detached from the main body, and another member arranged to release the limiting of the movement when the sheet containing member is attached to the main body.
Inventors
- 👤 Nobukazu Adachi
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 13:32
CPC Classifications
B; B65; B65H; B65H1/00; B65H1/26; B65H1/266; B65H1/04; G; G03; G03G; G03G15/00; G03G15/65; G03G15/6502
Claims Analysis
Total Claims: 51
Claim 1
Independent Claim
82 words
A sheet feed device comprising: sheet containing means for containing sheets, said sheet containing means being movable in a predetermined direction from a predetermined position; feed means for sending out the sheets contained in said sheet containing means disposed in said predetermined position; and movement limiting means for limiting said sheets from making a relative movement to a direction reverse to said predetermined direction relative to said sheet containing means only when said sheet containing means is moved from the predetermined position.
Claim 2
Dependent Claim
82 words
A sheet feed device comprising: sheet containing means for containing sheets, said sheet containing means being movable in a predetermined direction from a predetermined position; feed means for sending out the sheets contained in said sheet containing means disposed in said predetermined position; and movement limiting means for limiting said sheets from making a relative movement to a direction reverse to said predetermined direction relative to said sheet containing means only when said sheet containing means is moved from the predetermined position.
Claim 3
Dependent Claim
14 words
A device according to claim 1, wherein said sheet containing means includes a cassette.
Claim 4
Dependent Claim
22 words
A device according to claim 2, wherein said sheet containing means has pressing means for pressing the sheets on said feed means.
Claim 5
Dependent Claim
24 words
A device according to claim 1, wherein said feed means has a roller coming into contact with a surface of one of the sheets.
Claim 6
Dependent Claim
35 words
A device according to claim 4, wherein said feed means has separation means arranged opposite to said roller to come into frictional contact with a sheet sent out by said roller for separating the sheet.
Claim 7
Dependent Claim
37 words
A device according to claim 1, wherein said movement limiting means has a pressure-contact member arranged to come into pressure contact with the sheets for limiting a movement of the sheets relative to said sheet containing means.
Claim 8
Dependent Claim
28 words
A device according to claim 6, wherein said movement limiting means has a spring member for applying a bias force for pressing said pressure-contact member on the sheets.
Claim 9
Dependent Claim
45 words
A device according to claim 7, wherein said movement limiting means has release means for releasing the pressure contact of said pressure-contact member on the sheets against the bias force of said spring member when said sheet containing means is disposed in said predetermined position.
Claim 10
Dependent Claim
70 words
A device according to claim 1, wherein said movement limiting means has first and second members arranged so that when said sheet containing means has been moved from said predetermined position, at least one of said first and said second members moves in a direction to approach another to sandwich the sheets between said first and said second members, so that the sheets move integrally with said sheet containing means.
Claim 11
Dependent Claim
28 words
A device according to claim 9, wherein said first member is fixed in a position facing an upper surface of the sheets contained in said sheet containing means.
Claim 12
Dependent Claim
42 words
A device according to claim 9, wherein said second member is movable in a direction to approach said first member, and said movement limiting means has a spring member for urging said second member in the direction to approach said first member.
Claim 13
Dependent Claim
42 words
A device according to claim 11, wherein said movement limiting means has detaching means for detaching said second member from said first member against a bias force of said spring member when said sheet containing means is disposed in said predetermined position.
Claim 14
Dependent Claim
28 words
A device according to claim 12, wherein said detaching means has a camming surface arranged to come into contact with said second member to move said second member.
Claim 15
Dependent Claim
112 words
A sheet feed device comprising: sheet containing means for containing sheets, said sheet containing means being disposed in a feeding position capable of sending out the contained sheets and being able to move in a predetermined direction from said feeding position; feed means for sending out the sheets from said sheet containing means disposed in said feeding position; and movement limiting means having an extruding member which protrudes the neighborhood of a rear end of the sheets contained in said sheet containing means relative to said predetermined direction for limiting the relative movement between the sheets and the sheet containing means when said sheet containing means is moved in said predetermined direction.
Claim 16
Dependent Claim
112 words
A sheet feed device comprising: sheet containing means for containing sheets, said sheet containing means being disposed in a feeding position capable of sending out the contained sheets and being able to move in a predetermined direction from said feeding position; feed means for sending out the sheets from said sheet containing means disposed in said feeding position; and movement limiting means having an extruding member which protrudes the neighborhood of a rear end of the sheets contained in said sheet containing means relative to said predetermined direction for limiting the relative movement between the sheets and the sheet containing means when said sheet containing means is moved in said predetermined direction.
Claim 17
Dependent Claim
25 words
A device according to claim 14, wherein said feed means has a roller for coming into contact with a surface of one of the sheets.
Claim 18
Dependent Claim
35 words
A device according to claim 15, wherein said feed means has separation means arranged opposite to said roller to come into frictional contact with a sheet sent out by said roller for separating the sheet.
Claim 19
Dependent Claim
25 words
A device according to claim 16, wherein said movement limiting means has a spring member for urging said extruding member in a direction to protrude.
Claim 20
Dependent Claim
38 words
A device according to claim 17, wherein said movement limiting means has retracting means for retracting said extruding member against a bias force of said spring member when said sheet containing means is disposed in said feeding position.
Claim 21
Dependent Claim
41 words
A device according to claim 18, wherein said retracting means has a camming surface arranged to come into contact with said extruding member for retracting said extruding member according to the movement of said sheet containing means to said feeding position.
Claim 22
Dependent Claim
133 words
An image forming apparatus comprising: sheet containing means for containing sheets, said sheet containing means being disposed in a feeding position capable of sending out the contained sheets, and being movable in a predetermined direction from said feeding position; feed means for sending out the sheets contained in said sheet containing means disposed in said feeding position; image forming means for forming an image on each of the sheets sent out by said feed means; limiting means for limiting the relative movement of the sheets to a direction reverse to said predetermined direction relative to said sheet containing means only when said sheet containing means is moved from said feeding position; and releasing means for releasing the limitation by said limiting means when said sheet containing means is disposed at said feeding position.
Claim 23
Dependent Claim
133 words
An image forming apparatus comprising: sheet containing means for containing sheets, said sheet containing means being disposed in a feeding position capable of sending out the contained sheets, and being movable in a predetermined direction from said feeding position; feed means for sending out the sheets contained in said sheet containing means disposed in said feeding position; image forming means for forming an image on each of the sheets sent out by said feed means; limiting means for limiting the relative movement of the sheets to a direction reverse to said predetermined direction relative to said sheet containing means only when said sheet containing means is moved from said feeding position; and releasing means for releasing the limitation by said limiting means when said sheet containing means is disposed at said feeding position.
Claim 24
Dependent Claim
31 words
A device according to claim 20, wherein said movement limiting means has a pressure member arranged to come into pressure contact with the sheets for limiting a movement of the sheets.
Claim 25
Dependent Claim
69 words
A device according to claim 20, wherein said movement limiting means has first and second members arranged so that when said sheet containing means-has been moved from said feeding position, at least one of said first and said second members moves in a direction to approach another to sandwich the sheets between said first and said second members, so that the sheets move integrally with said sheet containing means.
Claim 26
Dependent Claim
107 words
A sheet feed device comprising: a sheet containing member for containing sheets and being movable to a predetermined direction from a predetermined feeding position; a feed member for sending out said sheets contained in said sheet containing member to a direction reverse to said predetermined direction when said sheet containing member is disposed at said feeding position; and an extruding member for protruding rearwardly relative to said predetermined direction of the sheets contained in said sheet containing member thus limiting the relative movement between the sheets and the sheet containing member when said sheet containing member is moved from said sheet feeding position to said predetermined direction.
Claim 27
Dependent Claim
107 words
A sheet feed device comprising: a sheet containing member for containing sheets and being movable to a predetermined direction from a predetermined feeding position; a feed member for sending out said sheets contained in said sheet containing member to a direction reverse to said predetermined direction when said sheet containing member is disposed at said feeding position; and an extruding member for protruding rearwardly relative to said predetermined direction of the sheets contained in said sheet containing member thus limiting the relative movement between the sheets and the sheet containing member when said sheet containing member is moved from said sheet feeding position to said predetermined direction.
Claim 28
Dependent Claim
16 words
A sheet feed device according to claim 23, wherein said sheet containing member includes a cassette.
Claim 29
Dependent Claim
27 words
A sheet feed device according to claim 23, further comprising a pressure member for pressing the sheets contained in said sheet containing member against said feed member.
Claim 30
Dependent Claim
17 words
A sheet feed device according to claim 23, wherein said feeding member includes a roller or rollers.
Claim 31
Dependent Claim
27 words
A sheet feed device according to claim 26, further comprising a friction member which makes a pressure contact with said roller or rollers for separating the sheets.
Claim 32
Dependent Claim
31 words
A sheet feed device according to claim 23, further comprising releasing means for releasing the limitation by said extruding member when said sheet containing member is disposed at said feeding position.
Claim 33
Dependent Claim
35 words
A sheet feed device according to claim 23, further comprising a movement limiting member for limiting an upward movement of the sheets contained in said sheet containing member in the neighborhood of said extruding member.
Claim 34
Dependent Claim
35 words
A sheet feed device according to claim 23, wherein said extruding member limits the relative movement of the sheets and the sheet containing member by abutting on the ends of said sheets when it protrudes.
Claim 35
Dependent Claim
41 words
A sheet feed device according to claim 23, further comprising a sandwiching member which sandwiches the sheets in cooperation with said extruding member when the extruding member protrudes, thereby limiting the relative movement of the sheets and the sheet containing member.
Claim 36
Dependent Claim
51 words
A sheet feed device according to claim 30, further comprising a sandwiching member for sandwiching sheets which have exceeded said extruding member in cooperation with the extruding member when said extruding member protrudes, thereby limiting the relative movement of said sheets exceeding the extruding member relative to said sheet containing member.
Claim 37
Dependent Claim
83 words
A sheet feed device comprising: sheet containing means for containing sheets, said sheet containing means being movable in a predetermined direction from a predetermined position; feed means for sending out the sheets contained in said sheet containing means disposed in said predetermined position; and moving means which moves in response to the movement of said sheet containing means when said sheet containing means is moved from said predetermined position to shift the sheet in said predetermined direction together with said sheet containing means.
Claim 38
Dependent Claim
83 words
A sheet feed device comprising: sheet containing means for containing sheets, said sheet containing means being movable in a predetermined direction from a predetermined position; feed means for sending out the sheets contained in said sheet containing means disposed in said predetermined position; and moving means which moves in response to the movement of said sheet containing means when said sheet containing means is moved from said predetermined position to shift the sheet in said predetermined direction together with said sheet containing means.
Claim 39
Dependent Claim
28 words
A sheet feed device according to claim 33, further comprising has a pressing member for pressing the sheet contained in said sheet containing means onto said feed means.
Claim 40
Dependent Claim
25 words
A sheet feed device according to claim 33, wherein said feed means has a rotating member which contacts the sheet to give it transferring force.
Claim 41
Dependent Claim
26 words
A sheet feed device according to claim 35, which further comprises a friction member which is pressed onto said rotating member to separate the sheet therefrom.
Claim 42
Dependent Claim
30 words
A sheet feed device according to claim 33, wherein said moving means projects into the feed path of the sheet when said sheet containing means is moved in said direction.
Claim 43
Dependent Claim
28 words
A sheet feed device according to claim 33, wherein said moving means moves the sheet in said direction by contacting the sheet protruding from said sheet containing means.
Claim 44
Dependent Claim
84 words
A sheet feed device comprising: sheet containing means for containing sheets, said sheet containing means being movable in a predetermined direction from a predetermined position; feed means for sending out the sheets contained in said sheet containing means disposed in said predetermined position; and preventing means which protrudes into the feed path of the sheet when said sheet containing means is moved from said predetermined position and contacts the sheet protruding from said sheet containing means to prevent the sheet from falling down therefrom.
Claim 45
Dependent Claim
84 words
A sheet feed device comprising: sheet containing means for containing sheets, said sheet containing means being movable in a predetermined direction from a predetermined position; feed means for sending out the sheets contained in said sheet containing means disposed in said predetermined position; and preventing means which protrudes into the feed path of the sheet when said sheet containing means is moved from said predetermined position and contacts the sheet protruding from said sheet containing means to prevent the sheet from falling down therefrom.
Claim 46
Dependent Claim
27 words
A sheet feed device according to claim 39, further comprising has pressing means for pressing the sheet contained in said sheet containing means onto said feed means.
Claim 47
Dependent Claim
25 words
A sheet feed device according to claim 39, wherein said feed means has a rotating member which contacts the sheet to give transferring force thereto.
Claim 48
Dependent Claim
24 words
A sheet feed device according to claim 39, wherein said feed means has a roller which contacts the sheet to give transferring force thereto.
Claim 49
Dependent Claim
22 words
A sheet feed device according to claim 42, wherein further comprises separating means for separating the sheet by co-operation with said roller.
Claim 50
Dependent Claim
16 words
A sheet feed device according to claim 43, wherein said separating means has a friction member.
Claim 51
Dependent Claim
32 words
A sheet feed device according to claim 39, which further comprises retracting means for retracting said preventing means from the feed path when said sheet containing means is at the predetermined position.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-04-30 | 1993-10-30 | 1994-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-30 | 1997-10-30 | 1998-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-30 | 2001-10-30 | 2002-05-01 | $7700.00 | Window Closed / Lapsed |