US3904190A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for feeding paperboard blanks
Assignee: Beazer East Inc
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Filing: 1974-03-15
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Granted: 1975-09-09
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Expires: 1994-03-15
Abstract
Abstract An improved blank feeding machine for feeding successive bottom blanks from a stack of blanks into adjacent processing machinery comprises a support table for supporting the stack of blanks thereon and defines with a gate an opening therebetween through which the bottom blanks are successively advanced into the adjacent machinery; a suction box reciprocating beneath the blanks applies suction pressure to the bottom blanks from the beginning of the feed stroke of the suction box throughout substantially the first half of the feed stroke and thereafter vents the suction pressure to atmosphere until the beginning of the next successive feed stroke. A suction pump delivers suction pressure to the suction box during the forward stroke of a piston within the suction pump; the suction pump includes a valve operable upon command to prevent delivery of the suction pressure to the suction box. A selectively operable first command system operates the valve to prevent delivery of suction pressure during each forward stroke of the piston to prevent advancement of the blanks during a ''''stop-feed'''' mode; a selectively operable second command system operates the valve to prevent delivery of suction pressure during alternate forward strokes of the piston to prevent advancement of the blanks during alternate feed strokes of the suction box during a ''''skip-feed'''' mode of operation.
Inventors
- 👤 Frederick Reinhold Kuehn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:49
CPC Classifications
B; B65; B65H; B65H3/00; B65H3/08; B65H3/12; B65H3/122
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
225 words
An improved blank feeding machine for feeding successive bottom blanks from a stack of blanks into adjacent processing machinery comprising in combination: support means for supporting said stack of blanks thereon and defining with a gate means an opening therebetween through which said bottom blanks are successively advanced into said adjacent machinery; advancing means reciprocable beneath said stack for applying suction pressure to said bottom blanks from the beginning of the feed stroke of said advancing means and continuing substantially through the first half of said feed stroke and thereafter for venting said suction pressure to atmosphere until the beginning of the next successive feed stroke; suction pump means for delivering suction pressure to said advancing means during the forward stroke of a piston means within said suction pump means, said suction pump means including valve means electrically operable upon command for preventing delivery of said suction pressure to said advancing means; selectively operable first command means for electrically operating said valve means to prevent delivery of said suction pressure during each forward stroke of said piston means to prevent advancement of said blanks; and selectively operable second command means for electrically operating said valve means to prevent delivery of said suction pressure during alternate forward strokes of said piston means to prevent advancement of said blanks during alternate feed strokes of said advancing means.
Claim 2
Dependent Claim
225 words
An improved blank feeding machine for feeding successive bottom blanks from a stack of blanks into adjacent processing machinery comprising in combination: support means for supporting said stack of blanks thereon and defining with a gate means an opening therebetween through which said bottom blanks are successively advanced into said adjacent machinery; advancing means reciprocable beneath said stack for applying suction pressure to said bottom blanks from the beginning of the feed stroke of said advancing means and continuing substantially through the first half of said feed stroke and thereafter for venting said suction pressure to atmosphere until the beginning of the next successive feed stroke; suction pump means for delivering suction pressure to said advancing means during the forward stroke of a piston means within said suction pump means, said suction pump means including valve means electrically operable upon command for preventing delivery of said suction pressure to said advancing means; selectively operable first command means for electrically operating said valve means to prevent delivery of said suction pressure during each forward stroke of said piston means to prevent advancement of said blanks; and selectively operable second command means for electrically operating said valve means to prevent delivery of said suction pressure during alternate forward strokes of said piston means to prevent advancement of said blanks during alternate feed strokes of said advancing means.
Claim 3
Dependent Claim
56 words
The blank feeding machine of claim 1 wherein said valve means opens automatically in response to an increase in air pressure ahead of said piston means during the return stroke thereof for venting said suction pump means and closes automatically in response to a biasing means connected thereto during the forward stroke of said piston means.
Claim 4
Dependent Claim
176 words
An improved suction pump means for a blank feeder comprising in combination: a cylinder means; a piston means reciprocable within said cylinder means for creating suction pressure within said cylinder means on the forward stroke of said piston means; drive means connecting said piston means and said blank feeder for reciprocating said piston means in timed relation thereto; conduit means connected between said cylinder means and a reciprocable blank advancing means on said blank feeder adapted to deliver suction pressure of predetermined magnitude from said cylinder means substantially instantaneously to said advancing means at the beginning of the feed stroke of said advancing means; and a valve means for automatiCally venting said cylinder means during the return stroke of said piston means, said valve means being electrically operable in response to a first command means to continuously vent said cylinder means to atmosphere on each forward stroke of said piston means and electrically operable in response to a second command means to vent said cylinder means to atmosphere on alternate forward strokes of said piston means.
Claim 5
Dependent Claim
176 words
An improved suction pump means for a blank feeder comprising in combination: a cylinder means; a piston means reciprocable within said cylinder means for creating suction pressure within said cylinder means on the forward stroke of said piston means; drive means connecting said piston means and said blank feeder for reciprocating said piston means in timed relation thereto; conduit means connected between said cylinder means and a reciprocable blank advancing means on said blank feeder adapted to deliver suction pressure of predetermined magnitude from said cylinder means substantially instantaneously to said advancing means at the beginning of the feed stroke of said advancing means; and a valve means for automatiCally venting said cylinder means during the return stroke of said piston means, said valve means being electrically operable in response to a first command means to continuously vent said cylinder means to atmosphere on each forward stroke of said piston means and electrically operable in response to a second command means to vent said cylinder means to atmosphere on alternate forward strokes of said piston means.
Claim 6
Dependent Claim
118 words
The suction pump means of claim 3 wherein said electrically operable valve means comprises: a valve plate means on said cylinder means pivotable into closing engagement with a vent means in said cylinder means; resilient biasing means for pivoting said valve plate means into closing engagement during forward strokes of said piston means, said valve plate means being pivotable out of closing engagement with said vent means during return strokes of said piston means for venting said cylinder means to atmosphere; and actuator means for pivoting said valve plate means out of closing engagement in opposition to said biasing means during forward strokes of said piston means in response to signals from said first and second command means.
Claim 7
Dependent Claim
44 words
The suction pump means of claim 4 wherein said actuator means comprises an electrically energized solenoid means mounted to said cylinder means for pivoting said valve plate means out of closing engagement in response to electrical signals from said first and second command means.
Claim 8
Dependent Claim
147 words
The suction pump means of claim 3 wherein: said first and second command means include first electrical switch means energized by said blank feeder for producing an electrical signal in timed relation thereto; said first command means further includes a second switch means for activating said valve means in response to said electrical signals to pivot said valve means to an open position on the rearward strokes of said piston means and to maintain said valve means in said open position during subsequent forward strokes of said piston means; and said second command means further includes a second switch means for activating said valve means in response to said electrical signals to pivot said valve means to said open position on alternate rearward strokes of said piston means and to maintain said valve means in said open position on said alternate forward strokes of said piston means.
Claim 9
Dependent Claim
31 words
The suction pump means of claim 6 wherein: said second switch means of both of said first and second command means includes an electrical switching means for activating said valve means.
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) | 1978-09-08 | 1979-03-10 | 1979-09-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-09-08 | 1983-03-10 | 1983-09-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-09-08 | 1987-03-10 | 1987-09-09 | $7700.00 | Window Closed / Lapsed |