Patent US3618934A successfully refreshed from Google Patents.
US3618934A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Feed roll assembly
Assignee: AB Dick Co
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Filing: 1970-05-18
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Granted: 1971-11-09
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Expires: 1990-05-18
Abstract
Abstract A feed roll assembly of two roll couples for transporting sheet material past a selected station at a uniform speed, each couple being separable under stress to allow for thick documents to be driven. The roll couples are interconnected with a linkage that allows initial independent separation movement of each of the roll couples, and thereafter separation movement of one of the roll couples will cause a corresponding but proportionately less separation of the other roll couple.
Inventors
- 👤 Richard W Germuska
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 05:54
CPC Classifications
G; G03; G03B; G03B27/00; G03B27/32; G03B27/52; G03B27/62; G03B27/6207; G03B27/625; G03B27/6257
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
132 words
A feed roll assembly for feeding a flat sheet past a station in a smooth unwrinkled condition, said station having an entrance and an exit side, comprising: an entrance set of first and second driving rolls at the entrance side of said station, an exit set of third and fourth driving rolls at the exit side of said station, each set of rolls being adapted to engage and drive the sheet to feed it past the station; means mounting said rolls of each set for relative separation, and connection means interconnecting said sets of rolls for separation of said exit set as a function of separation of said entrance set, separation of said exit set being a distance which is a fractional portion of the distance which said entrance set is separated.
Claim 2
Dependent Claim
132 words
A feed roll assembly for feeding a flat sheet past a station in a smooth unwrinkled condition, said station having an entrance and an exit side, comprising: an entrance set of first and second driving rolls at the entrance side of said station, an exit set of third and fourth driving rolls at the exit side of said station, each set of rolls being adapted to engage and drive the sheet to feed it past the station; means mounting said rolls of each set for relative separation, and connection means interconnecting said sets of rolls for separation of said exit set as a function of separation of said entrance set, separation of said exit set being a distance which is a fractional portion of the distance which said entrance set is separated.
Claim 3
Dependent Claim
15 words
The invention as defined in claim 1 wherein said connection means includes mechanical linkage means.
Claim 4
Dependent Claim
38 words
The invention as defined in claim 2 wherein said mechanical linkage includes first and second link members connected respectively to said first and third rolls, said first and second link members being pivotally mounted to move said rolls.
Claim 5
Dependent Claim
146 words
A feed roll assembly for feeding a flat object past a station in a smooth unwrinkled condition comprising: an entrance set of first and second driving rolls at one side of said station; an exit set of third and fourth driving rolls at the other side of said station, each set of rolls being adapted to drivingly engage the object to feed it past the station; means mounting said first and third rolls for separation movement toward and away from said second and fourth rolls respectively; and connection means interconnecting said first and third rolls for moving said third roll responsive to the movement of said first roll, an initial predetermined distance away from said second roll before moving said third roll away from said fourth roll, whereby to allow passage of momentary discontinuities through said set without loss of drive at said exit roll set.
Claim 6
Dependent Claim
146 words
A feed roll assembly for feeding a flat object past a station in a smooth unwrinkled condition comprising: an entrance set of first and second driving rolls at one side of said station; an exit set of third and fourth driving rolls at the other side of said station, each set of rolls being adapted to drivingly engage the object to feed it past the station; means mounting said first and third rolls for separation movement toward and away from said second and fourth rolls respectively; and connection means interconnecting said first and third rolls for moving said third roll responsive to the movement of said first roll, an initial predetermined distance away from said second roll before moving said third roll away from said fourth roll, whereby to allow passage of momentary discontinuities through said set without loss of drive at said exit roll set.
Claim 7
Dependent Claim
15 words
The invention as defined in claim 4 wherein said connection means includes mechanical linkage means.
Claim 8
Dependent Claim
16 words
The invention as defined in claim 5 wherein said mechanical linkage includes a lost motion connection.
Claim 9
Dependent Claim
30 words
The invention as defined in claim 4 wherein said connection means is configured to allow both said first and third rolls to move an initial distance without moving the other.
Claim 10
Dependent Claim
63 words
The invention as defined in claim 4 further characterized by said connection means being configured and arranged to cause the movement of said third roll away from said fourth roll in response to the movement of said first roll away from said second roll to be a distance which is a fraction less than one of the distance moved by said first roll.
Claim 11
Dependent Claim
31 words
The invention as defined in claim 8 further characterized by said connection means including mechanical linkage means, said linkage means having pivotally mounted link members which have a lost motion connection.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-08 | 1975-05-10 | 1975-11-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-08 | 1979-05-10 | 1979-11-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-08 | 1983-05-10 | 1983-11-09 | $7700.00 | Window Closed / Lapsed |