Patent US2822548A successfully refreshed from Google Patents.
Patent US3633903A successfully refreshed from Google Patents.
US3633903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sheet-transporting assembly
Assignee: Individual
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Filing: 1970-01-07
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Granted: 1972-01-11
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Expires: 1990-01-07
Abstract
Abstract A sheet-transporting assembly including a continuous suction conveyor which operates continuously to carry previously die-cut and stripped cardboard blanks to a predetermined location whereat a vertically reciprocal grid system activated by an automatic signal operates to separate the said blanks from the conveyor and deposits the blanks upon a descending pallet elevator system.
Inventors
- 👤 Joseph E Foster Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 07:42
CPC Classifications
B; B65; B65H; B65H29/00; B65H29/26; B65H29/32; G; G06; G06V; G06V10/00; G06V10/40; G06V10/44; G06V10/457
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
255 words
In a sheet-transporting assembly for individually carrying sheets of material, the combination of A. a continuous suction conveyor carrying the said sheets by fan suction forces, 1. said suction conveyor including a plurality of parallel, transverse suction boxes arranged in an endless loop, each said suction box being provided with a plurality of suction openings, 2. each suction box being provided at the bottom thereof with a plurality of spaced, grid wire receiving slots, a. said slots extending in the direction of sheet travel and being longitudinally aligned to define continuous grid wire receiving areas; B. sensing means detecting the leading edge of each sheet at a precise location along the suction conveyor to activate the grid means to separate the sheet from the suction conveyor; and C. grid means responsive to detection signals from the sensing means, 1. said grid means including an operator connected to front and rear bars, said bars reciprocating between an upper position and a lower position in response to function of the operator, 2. said grid means further including a plurality of longitudinally extending, spaced, parallel wires, said wires respectively connecting between the front and rear bars, a. said wires lying within the grid wire receiving slots when the front and rear bars are in the upper position and said wires positioning below the suction boxes when the front and rear bars reciprocate to the lower position to thereby push the sheets away from the suction boxes and out of the range of attraction of the fan suction forces.
Claim 2
Dependent Claim
255 words
In a sheet-transporting assembly for individually carrying sheets of material, the combination of A. a continuous suction conveyor carrying the said sheets by fan suction forces, 1. said suction conveyor including a plurality of parallel, transverse suction boxes arranged in an endless loop, each said suction box being provided with a plurality of suction openings, 2. each suction box being provided at the bottom thereof with a plurality of spaced, grid wire receiving slots, a. said slots extending in the direction of sheet travel and being longitudinally aligned to define continuous grid wire receiving areas; B. sensing means detecting the leading edge of each sheet at a precise location along the suction conveyor to activate the grid means to separate the sheet from the suction conveyor; and C. grid means responsive to detection signals from the sensing means, 1. said grid means including an operator connected to front and rear bars, said bars reciprocating between an upper position and a lower position in response to function of the operator, 2. said grid means further including a plurality of longitudinally extending, spaced, parallel wires, said wires respectively connecting between the front and rear bars, a. said wires lying within the grid wire receiving slots when the front and rear bars are in the upper position and said wires positioning below the suction boxes when the front and rear bars reciprocate to the lower position to thereby push the sheets away from the suction boxes and out of the range of attraction of the fan suction forces.
Claim 3
Dependent Claim
82 words
each suction box being provided at the bottom thereof with a plurality of spaced, grid wire receiving slots, a. said slots extending in the direction of sheet travel and being longitudinally aligned to define continuous grid wire receiving areas; B. sensing means detecting the leading edge of each sheet at a precise location along the suction conveyor to activate the grid means to separate the sheet from the suction conveyor; and C. grid means responsive to detection signals from the sensing means,
Claim 4
Dependent Claim
82 words
each suction box being provided at the bottom thereof with a plurality of spaced, grid wire receiving slots, a. said slots extending in the direction of sheet travel and being longitudinally aligned to define continuous grid wire receiving areas; B. sensing means detecting the leading edge of each sheet at a precise location along the suction conveyor to activate the grid means to separate the sheet from the suction conveyor; and C. grid means responsive to detection signals from the sensing means,
Claim 5
Dependent Claim
85 words
said grid means further including a plurality of longitudinally extending, spaced, parallel wires, said wires respectively connecting between the front and rear bars, a. said wires lying within the grid wire receiving slots when the front and rear bars are in the upper position and said wires positioning below the suction boxes when the front and rear bars reciprocate to the lower position to thereby push the sheets away from the suction boxes and out of the range of attraction of the fan suction forces.
Claim 6
Dependent Claim
85 words
said grid means further including a plurality of longitudinally extending, spaced, parallel wires, said wires respectively connecting between the front and rear bars, a. said wires lying within the grid wire receiving slots when the front and rear bars are in the upper position and said wires positioning below the suction boxes when the front and rear bars reciprocate to the lower position to thereby push the sheets away from the suction boxes and out of the range of attraction of the fan suction forces.
Claim 7
Dependent Claim
38 words
The invention of claim 1 wherein the said slots are of a depth greater than the height of the wires and wherein the wires position completely within the wire-receiving areas when the bars reciprocate to the upper position.
Claim 8
Dependent Claim
29 words
The invention of claim 2 wherein the said operator includes an air-activated cylinder and a crosshead responsive to the cylinder and respectively connected to the front and rear bars.
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) | 1975-01-10 | 1975-07-12 | 1976-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-01-10 | 1979-07-12 | 1980-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-01-10 | 1983-07-12 | 1984-01-11 | $7700.00 | Window Closed / Lapsed |