US3675388A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Load bagging apparatus
Assignee: Signode Corp
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Filing: 1971-03-08
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Granted: 1972-07-11
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Expires: 1991-03-08
Abstract
Abstract A semi-automatic apparatus for facilitating the application of an inverted plastic film bag to a rectangular stack of articles, the stack presenting irregular side faces. An open rectangular frame is mounted for vertical movement between approximate floor level and above-the-stack level. A bag loaded on the frame at floor level is carried upwardly with the frame, aligned vertically with the stack, and then pulled downwardly over the stack, as the frame descends, by means of a series of four jawtype gripper units which are floatingly mounted at the corners of the frame and maintain the rim of the bag in an open condition. During descent of the frame a series of cams ride against the sides of the stack, compound their motion, and transmit it to the gripper units in such a manner that a clearance is at all times maintained between the open rim of the bag and the sides of the stack.
Inventors
- 👤 Peter Lems
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 20:04
CPC Classifications
B; B65; B65B; B65B43/00; B65B43/26; B65B43/30
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
128 words
In an apparatus for progressively pulling an open-ended plastic bag film downwardly over a fixedly supported load, in combination, a frame support positioned in the vicinity of the load, a bag-receiving frame presenting a central frame opening mounted on said support for vertical and horizontal movement from a loading position laterally alongside the load to a position wherein the frame opening is in vertical register with the load, and then downwardly in surrounding bag-pulling relationship with respect to the load, and releasAble gripper means disposed at spaced regions around the frame opening and engageable with the rim of a bag which is loaded on the frame in the loading position thereof for maintaining said rim in an open condition during downward descent of the frame about the load.
Claim 2
Dependent Claim
128 words
In an apparatus for progressively pulling an open-ended plastic bag film downwardly over a fixedly supported load, in combination, a frame support positioned in the vicinity of the load, a bag-receiving frame presenting a central frame opening mounted on said support for vertical and horizontal movement from a loading position laterally alongside the load to a position wherein the frame opening is in vertical register with the load, and then downwardly in surrounding bag-pulling relationship with respect to the load, and releasAble gripper means disposed at spaced regions around the frame opening and engageable with the rim of a bag which is loaded on the frame in the loading position thereof for maintaining said rim in an open condition during downward descent of the frame about the load.
Claim 3
Dependent Claim
63 words
The combination set forth in claim 1, wherein said releasable gripper means comprises a pair of cooperating gripper jaws movable relative to each other between closed bag-engaging and open bag-releasing positions, and means engageable with the load and effective during downward bag-pulling descent of the frame for maintaining said jaws, and consequently the rim of the bag, out of contact with the load.
Claim 4
Dependent Claim
158 words
In an apparatus for progressively pulling an open-ended plastic film bag downwardly over a rectangular floor-supported load, in combination, a support adjacent the load, a horizontally disposed rectangular bag-receiving frame presenting a central frame opening and mounted on said support for both vertical and horizontal shifting movement whereby the frame is movable bodily from a loading position at floor level alongside the load vertically to an intermediate raised position above the uppermost level of the load, and then horizontally to a position wherein said frame opening is in vertical register with the load, and finally downwardly in surrounding bag-pulling relationship with respect to the load to substantially floor level, and releasable gripper means disposed at each corner of the frame opening and engageable with the rim of a bag which is loaded on the frame in the loading position thereof for maintaining said rim in an open rectangular condition during downward descent of the frame about the load.
Claim 5
Dependent Claim
158 words
In an apparatus for progressively pulling an open-ended plastic film bag downwardly over a rectangular floor-supported load, in combination, a support adjacent the load, a horizontally disposed rectangular bag-receiving frame presenting a central frame opening and mounted on said support for both vertical and horizontal shifting movement whereby the frame is movable bodily from a loading position at floor level alongside the load vertically to an intermediate raised position above the uppermost level of the load, and then horizontally to a position wherein said frame opening is in vertical register with the load, and finally downwardly in surrounding bag-pulling relationship with respect to the load to substantially floor level, and releasable gripper means disposed at each corner of the frame opening and engageable with the rim of a bag which is loaded on the frame in the loading position thereof for maintaining said rim in an open rectangular condition during downward descent of the frame about the load.
Claim 6
Dependent Claim
83 words
The combination set forth in claim 3, wherein said frame projects radially outwardly from said support and has its inner end pivotally and slidably connected thereto for vertical sliding movement of the frame during travel of the latter from its loading position to its raised intermediate position, as well as during its downward movement, and for horizontal swinging movement about the axis of the support during travel of the frame from its raised intermediate position to its position of register with the load.
Claim 7
Dependent Claim
69 words
The combination set forth in claim 4, wherein said releasable gripper means at each corner of the frame comprises a pair of cooperating gripper jaws movable relative to each other between closed bag-engaging and open bag-releasing positions, and means engageable with the load and effective during downward bag-pulling descent of the frame for maintaining said jaws, and consequently the rim of the bag, out of contact with the load.
Claim 8
Dependent Claim
105 words
The combination set forth in claim 4, wherein said gripper means comprises a fixed jaw member floatingly suspended from said frame for universal swinging movement, and a cooperating movable jaw member pivoted thereto, said movable jaw member being movable relative to the fixed jaw member between closed bag-gripping position and an open bag-releasing position and cam means mounted on the fixed jaw member and slidably engageable with the load during downward movement of the frame for maintaining said fixed jaw member and consequently the adjacent portion of the bag rim which is held thereby, spaced from the load during such downward movement of the frame.
Claim 9
Dependent Claim
44 words
The combination set forth in claim members, one wherein said cam means comprises a pair of cam members, one of which is engageable with one vertical side of the load and the other of which is engageable with an adjacent side of the frame.
Claim 10
Dependent Claim
47 words
The combination set forth in claim 7, wherein each cam member is of link-like construction, has its upper end pivoted to the frame and its lower end effectively pivoted to the fixed jaw member and, in part, establishes the floating suspension of the latter from the frame.
Claim 11
Dependent Claim
67 words
The combination set forth in claim 8, wherein each cam is formed of spring material, the pivotal connection between its upper end and the frame allows for free lateral swinging moveMent thereof in a plane parallel to the general plane of the side of the load with which it is engageable, and for restrained swinging movement under flexion in a direction toward and away from the load.
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) | 1975-07-11 | 1976-01-10 | 1976-07-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-07-11 | 1980-01-10 | 1980-07-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-07-11 | 1984-01-10 | 1984-07-11 | $7700.00 | Window Closed / Lapsed |