Patent US3595139A successfully refreshed from Google Patents.
US3595139A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for nesting bags
Assignee: GT Schjeldahl Co
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Filing: 1969-07-18
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Granted: 1971-07-27
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Expires: 1989-07-18
Abstract
Abstract Apparatus for loading a series of bags onto a mandrel in nested relationship with each bag in the series being disposed inside of its next succeeding neighbor in the series, the apparatus handling the bags accomplishing the operation with both positive loading and positive release, with the release being accomplished at substantially the same point in each cycle. The apparatus includes a delivery means such as a first conveyor which delivers the individual bags to be loaded in series relationship onto a second conveyor. The second conveyor has a plurality of pickup means for releasably engaging the surface of each bag, and thereafter transporting these engaged bags in stable disposition to a predetermined discharge point. The second conveyor means is provided with means to open the bag relatively widely so as to permit the bottom of the next preceding bag to be received within the walls of the widely opened top.
Inventors
- 👤 Richard C Adams
- 👤 Thomas J Monahan
- 👤 George A Picotte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 14:49
CPC Classifications
B; B31; B31B; B31B70/00; B31B70/74; B31B70/92; B31B70/98; B31B70/988; B31B2160/00; B31B2160/10
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
202 words
Apparatus for nesting bags having an open top, opposed end walls, opposed front and rear sidewalls, and a bottom wall, said apparatus comprising: a. first conveyor means having bag treatment means for forming a plurality of gripping surfaces on opposed surfaces of said sidewalls and at points adjacent the edge surfaces of said sidewalls and adjacent the open top, and being arranged to deliver said bags with gripping surfaces to a discharge station; b. second conveyor means with a central axis and with pickup means for releasably engaging and spreading said gripping surfaces, said second conveyor means being disposed generally intermediate said discharge station and a nesting station, and being arranged to transfer bags engaged by said pickup means to said nesting station; c. a nesting station comprising a tongue means with an axis generally coincidental with the central axis of said second conveyor means, and with a forward abutment surface disposed generally transversely of said central axis; and d. release actuation means responsive to the axial position of said pickup means arranged to release said pickup means from said gripping surfaces as the forward motion of the bag retained by said pickup means is restrained by contact with said abutment surface.
Claim 2
Dependent Claim
202 words
Apparatus for nesting bags having an open top, opposed end walls, opposed front and rear sidewalls, and a bottom wall, said apparatus comprising: a. first conveyor means having bag treatment means for forming a plurality of gripping surfaces on opposed surfaces of said sidewalls and at points adjacent the edge surfaces of said sidewalls and adjacent the open top, and being arranged to deliver said bags with gripping surfaces to a discharge station; b. second conveyor means with a central axis and with pickup means for releasably engaging and spreading said gripping surfaces, said second conveyor means being disposed generally intermediate said discharge station and a nesting station, and being arranged to transfer bags engaged by said pickup means to said nesting station; c. a nesting station comprising a tongue means with an axis generally coincidental with the central axis of said second conveyor means, and with a forward abutment surface disposed generally transversely of said central axis; and d. release actuation means responsive to the axial position of said pickup means arranged to release said pickup means from said gripping surfaces as the forward motion of the bag retained by said pickup means is restrained by contact with said abutment surface.
Claim 3
Dependent Claim
77 words
The apparatus for nesting bags as defined in claim 1 being particularly characterized in that means are provided along said first conveyor to form folded gussets on opposed end walls of said bags, and punch means are disposed laterally of said first conveyor for forming holes through at least the opposed lateral edge surfaces of said bags, and wherein said pickup means comprises hook means for engagement with the holes formed in said opposed lateral edge surfaces.
Claim 4
Dependent Claim
19 words
a bag supporting disposition with the bag supporting axis being disposed generally transversely to the second conveyor axis; and
Claim 5
Dependent Claim
19 words
a bag supporting disposition with the bag supporting axis being disposed generally transversely to the second conveyor axis; and
Claim 6
Dependent Claim
19 words
a bag supporting disposition with the bag supporting axis being disposed generally transversely to the second conveyor axis; and
Claim 7
Dependent Claim
19 words
a bag supporting disposition with the bag supporting axis being disposed generally transversely to the second conveyor axis; and
Claim 8
Dependent Claim
29 words
A release disposition with the bag supporting axis being disposed generally parallel to the second conveyor axis, and with the tip thereof extending oppositely to the direction of travel.
Claim 9
Dependent Claim
29 words
A release disposition with the bag supporting axis being disposed generally parallel to the second conveyor axis, and with the tip thereof extending oppositely to the direction of travel.
Claim 10
Dependent Claim
29 words
a release disposition with the bag supporting axis being disposed generally parallel to the second conveyor axis, and with the tip thereof extending oppositely to the direction of travel.
Claim 11
Dependent Claim
29 words
a release disposition with the bag supporting axis being disposed generally parallel to the second conveyor axis, and with the tip thereof extending oppositely to the direction of travel.
Claim 12
Dependent Claim
89 words
The apparatus for nesting bags as defined in claim 1 being particularly characterized in that means are provided along said first conveyor to form inwardly folded gussets of said opposed end walls, and punch means are disposed laterally of said first conveyor for forming holes through at least the opposed lateral edge surfaces of said sidewalls adjacent each lateral edge thereof and adjacent the open top of said bag, and wherein said pickup means comprises hook means for engagement with the holes formed in said opposed lateral edge surfaces.
Claim 13
Dependent Claim
45 words
The apparatus for nesting bags as defined in claim 3 being particularly characterized in that a pair of punch means are disposed along each lateral edge of said first conveyor means for forming superimposed holes through both the sidewall and its adjacent gusset portion only.
Claim 14
Dependent Claim
41 words
The apparatus as defined in claim 4 being particularly characterized in that each pair of punch means disposed along one lateral edge of said first conveyor is arranged to form laterally spaced holes through opposed sidewall-gusset portion pairs of said bags.
Claim 15
Dependent Claim
49 words
The apparatus as defined in claim 1 being particularly characterized in that said pickup means comprises a pickup pin having a shank portion and a bag supporting portion, the bag supporting portion having an axis disposed generally parallel to but spaced outwardly from the axis of said second conveyor.
Claim 16
Dependent Claim
53 words
The apparatus as defined in claim 6 being particularly characterized in that said pickup pins are supported by a pair of racks arranged in oppositely disposed relationship to a bag within said second conveyor means, the racks being spaced from and havinG an axis generally transverse to the axis of said second conveyor.
Claim 17
Dependent Claim
96 words
The apparatus as defined in claim 6 being particularly characterized in that: a. the axis of the shank portion of each pickup pin is disposed generally normal to both the axis of said bag supporting portion and the axis of said second conveyor; and b. means are provided to dispose the bag supporting portion of said pickup pin in a plurality of arcuately spaced stable dispositions, including; 1. a pickup disposition with the bag supporting axis being disposed generally parallel to the second conveyor axis and with the tip thereof extending in the direction of travel;
Claim 18
Dependent Claim
71 words
The apparatus as defined in claim 7 being particularly characterized in that each of said racks is supported by pairs of endless belts disposed generally adjacent the lateral edge of the bags, and with each of said pairs of belts having a span adjacent the axis of said second conveyor and a span remote from the axis of said second conveyor and with belt-carrying wheels at the end of each span.
Claim 19
Dependent Claim
62 words
The apparatus as defined in claim 9 being particularly characterized in that said pickup pins engage the hole formed in the bag surface as the endless belt approaches the span adjacent the axis of said second conveyor and while the bag support portion of the pickup pin is rotating arcuately toward a disposition generally parallel to the axis of said second conveyor.
Claim 20
Dependent Claim
34 words
The apparatus as defined in claim 10 being particularly characterized in that means are provided for disposing the bag support portion of said pickup pin in a plurality of arcuately spaced stable dispositions, including;
Claim 21
Dependent Claim
57 words
The apparatus as defined in claim 8 being particularly characterized in that Geneva drive means are provided for rotating said shank portions, the drive means including a plurality of cams disposed along the path of travel of said shank portion and a plurality of cam followers coupled to said shank portion and arranged for axial rotation therewith.
Claim 22
Dependent Claim
95 words
The apparatus as defined in claim 12 being particularly characterized in that: a. first cam means are provided for disposing said bag supporting portion in a bag pickup disposition as the pin enters the holes formed in the bag; b. second cam means are provided for rotating said bag supporting portion to a bag supporting disposition immediately after picking up the bag; and c. third cam means are provided for rotating said bag supporting portion to a release disposition as the bottom wall of the engaged bag approaches the abutment surface of said nesting station.
Claim 23
Dependent Claim
55 words
The apparatus as defined in claim 9 being particularly characterized in that the span adjacent the axis of the second conveyor diverges angularly from the plane of the tongue as the span position approaches the abutment member to spread the opposed front and rear sidewalls to permit a plurality of bags to engage said tongue.
References Cited (Backward Citations)
USRE26075E
Cited
US2973612A
Cited
DE1084473B
Cited
US3183750A
Cited
US3163352A
Cited
US3161347A
Cited
US3440124A
Cited
US3512338A
Cited
US3406818A
Cited
US3380579A
Cited
US3513755A
Cited
US3485421A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-07-26 | 1975-01-25 | 1975-07-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-07-26 | 1979-01-25 | 1979-07-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-07-26 | 1983-01-25 | 1983-07-27 | $7700.00 | Window Closed / Lapsed |