US3672667A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for staggering blanks of sheet material
Assignee: Individual
•
Filing: 1970-07-09
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Granted: 1972-06-27
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Expires: 1990-07-09
Abstract
Abstract Blanks of sheet material, to be assembled in staggered relationship for the application of glue to overlapping flaps thereof, are horizontally fed at a relatively high speed to the upper run of an endless conveyor moving at the same speed and carrying at least one wedge-shaped cam in whose wake the blanks are entrained by suction toward a pair of exit rollers moving at a relatively low speed. The rear part of each blank, forming a flap, is thereby caused to ride up the inclined leading flank of the next oncoming cam, thus overlapping the front part of the next-following blank. The feeding of the blank to the exit rollers is facilitated by a transfer roller closely spaced from the upper conveyor surface so as to hold the raised flap down onto the cam.
Inventors
- 👤 Bruno Pahlitzsch
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 19:29
CPC Classifications
B; B31; B31B; B31B70/00; B31B70/74; B31B70/92; B31B70/94; B31B70/96; B31B2150/00; B31B2160/00; B31B2160/10
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
208 words
An apparatus for staggering blanks of sheet material, comprising: an endless conveyor carrying at least one wedge on the outer surface thereof, said wedge having a leading flank inclined to said surface; feeding means upstream of said conveyor for delivering a succession of blanks of sheet material to a substantially horizontal upper run of said conveyor in the wake of said wedge; transport means downstream of said feeding means for removing said blanks from said conveyor at a speed less than that of said conveyor, thereby causing the rear end of each of said blanks to ride up the leading flank of said wedge to overlap the following blank, said transport means including a transfer roller in the path of said wedge at a distance from said upper run substantially equal to the height of said wedge for compressing the overlapping blanks therebetween; and a stationary member extending along said upper run adjacent the inner surface of said conveyor beneath said upper run and having an upwardly open channel communicating with a vacuum source, said conveyor having at least one aperture upstream of said wedge effective to apply suction to an overlying blank upon registering with said channel, said channel extending past the location of said transfer roller.
Claim 2
Independent Claim
208 words
An apparatus for staggering blanks of sheet material, comprising: an endless conveyor carrying at least one wedge on the outer surface thereof, said wedge having a leading flank inclined to said surface; feeding means upstream of said conveyor for delivering a succession of blanks of sheet material to a substantially horizontal upper run of said conveyor in the wake of said wedge; transport means downstream of said feeding means for removing said blanks from said conveyor at a speed less than that of said conveyor, thereby causing the rear end of each of said blanks to ride up the leading flank of said wedge to overlap the following blank, said transport means including a transfer roller in the path of said wedge at a distance from said upper run substantially equal to the height of said wedge for compressing the overlapping blanks therebetween; and a stationary member extending along said upper run adjacent the inner surface of said conveyor beneath said upper run and having an upwardly open channel communicating with a vacuum source, said conveyor having at least one aperture upstream of said wedge effective to apply suction to an overlying blank upon registering with said channel, said channel extending past the location of said transfer roller.
Claim 3
Dependent Claim
18 words
An apparatus as defined in claim 1 wherein said wedge is duplicated with uniform spacing along said conveyor.
Claim 4
Dependent Claim
44 words
An apparatus as defined in claim 1 wherein said feeding means includes two counter-rotating entrance rollers located on opposite sides of a horizontal plane tangent to the transfer roller, said transport means comprising two counter-rotating exit rollers located on opposite sides of said plane.
Claim 5
Dependent Claim
48 words
An apparatus as defined in claim 3 wherein said wedge has a trailing flank substantially perpendicular to said surface, said entrance rollers being arranged to operate at a sufficiently high speed relative to that of said conveyor to thrust each oncoming blank into contact with said trailing flank.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-06-27 | 1975-12-27 | 1976-06-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-06-27 | 1979-12-27 | 1980-06-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-06-27 | 1983-12-27 | 1984-06-27 | $7700.00 | Window Closed / Lapsed |