Patent US3384370A successfully refreshed from Google Patents.
US3690221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of manufacturing a block bottom bag
Assignee: URNDMOLLER AND HOLSCHER
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Filing: 1970-07-02
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Granted: 1972-09-12
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Expires: 1990-07-02
Abstract
Abstract According to a method of manufacturing a cross bottom or block bottom bag or sack with a stuck bottom, a cross bottom or block bottom which is free of adhesive is folded on a tube portion, the side flaps of which bottom are not wider or are only a little wider than half the width of the bottom. A bottom sheet is fitted which extends with its end portions over the corner tucks and which, before fitting, is provided over the entire area of its side which is to be stuck to the bottom side flaps with an adhesive coating. This adhesive coating still has a moistening capacity sufficient to moisten the cooperating surfaces when the bottom sheet is fitted. Then the bottom side flaps and the bottom sheet are pressed against each other. In a cross bottom or block bottom bag or sack with a bottom sheet and bottom side flaps which do not overlap or only overlap over a narrow region, the bottom sheet is arranged within the bottom. Said bottom sheet is stuck with its end portions to the outside of the corner tucks and extends at least from one bottom flap fold to the other and has an adhesive coating which was applied before insertion of the bottom sheet. The adhesive coating is transferred by moistening from the bottom sheet to the outside of the corner tucks and the insides of the bottom side flaps.
Inventors
- 👤 Herbert Schmedding
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:29
CPC Classifications
B; B65; B65D; B65D31/00; B65D31/08
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
210 words
A method of manufacturing a block bottom bag with a stuck bottom, comprising: a. folding on one end of a tube portion an open block bottom having two opposing cornertucks and two opposing side flaps which are left free from adhesive and in which the flaps are at most only a little wider than half the width of the bottom; b. providing a bottom sheet which is approximately as wide and as long as the bottom and which has a first adhesive coating covering the entire side of the bottom sheet which is to be stuck to the bottom side flaps and a second adhesive coating on the other side of the bottom sheet only at the end portions which are intended to face the corner tucks; c. placing the bottom sheet with its said other side face down on the open block bottom and with its end portions having said second adhesive coating facing the corner tucks of the open bottom while said second adhesive coating still has a moistening capacity sufficient to moisten the cooperating surfaces of the open block bottom; and d. folding over the block bottom side flaps onto the side of the bottom sheet having said first adhesive coating and pressing them against each other.
Claim 2
Independent Claim
210 words
A method of manufacturing a block bottom bag with a stuck bottom, comprising: a. folding on one end of a tube portion an open block bottom having two opposing cornertucks and two opposing side flaps which are left free from adhesive and in which the flaps are at most only a little wider than half the width of the bottom; b. providing a bottom sheet which is approximately as wide and as long as the bottom and which has a first adhesive coating covering the entire side of the bottom sheet which is to be stuck to the bottom side flaps and a second adhesive coating on the other side of the bottom sheet only at the end portions which are intended to face the corner tucks; c. placing the bottom sheet with its said other side face down on the open block bottom and with its end portions having said second adhesive coating facing the corner tucks of the open bottom while said second adhesive coating still has a moistening capacity sufficient to moisten the cooperating surfaces of the open block bottom; and d. folding over the block bottom side flaps onto the side of the bottom sheet having said first adhesive coating and pressing them against each other.
Claim 3
Independent Claim
180 words
A method of manufacturing a block bottom bag with a stuck bottom, comprising: a. folding on one end of a tube portion an open block bottom having two opposing corner tucks and two opposing side flaps which are left free from adhesive and in which the side flaps are at most only a little wider than half the width of the bottom; b. providing a bottom sheet being at most the same width and the same length as the closed block bottom and having an adhesive coating covering the entire side of the bottom sheet which is to be stuck to the block bottom and being left free from adhesive on its other side; c. folding over the block bottom side flaps so as to close the open block bottom; and d. placing the bottom sheet with its side having the adhesive coating face down on the closed block bottom while said adhesive coating still has a moistening capacity sufficient to moisten the cooperating surfaces of the closed block bottom and pressing the bottom sheet against the closed block bottom.
Claim 4
Independent Claim
180 words
A method of manufacturing a block bottom bag with a stuck bottom, comprising: a. folding on one end of a tube portion an open block bottom having two opposing corner tucks and two opposing side flaps which are left free from adhesive and in which the side flaps are at most only a little wider than half the width of the bottom; b. providing a bottom sheet being at most the same width and the same length as the closed block bottom and having an adhesive coating covering the entire side of the bottom sheet which is to be stuck to the block bottom and being left free from adhesive on its other side; c. folding over the block bottom side flaps so as to close the open block bottom; and d. placing the bottom sheet with its side having the adhesive coating face down on the closed block bottom while said adhesive coating still has a moistening capacity sufficient to moisten the cooperating surfaces of the closed block bottom and pressing the bottom sheet against the closed block bottom.
Claim 5
Dependent Claim
46 words
A method according to claim 1, wherein the tube portion is made of plastics film, and wherein a plastics adhesive of which the solvent is removed before fitting of the bottom sheet, but which has the moistening capacity necessary to moisten the co-operating surface is used.
Claim 6
Dependent Claim
55 words
A method according to claim 1 wherein the tube portion is made of polyolefin or similar plastics film with poor adhesive properties, wherein the web of plastics film serving to manufacture the tube portion is subjected to a surface activating preliminary treatment, preferably by corona discharge, in the regions which are later to be stuck.
Claim 7
Dependent Claim
46 words
A method according to claim 2 wherein the tube portion is made of plastics film, and wherein a plastics adhesive of which the solvent is removed before fitting of the bottom sheet, but which has the moistening capacity necessary to moisten the cooperating surface is used.
Claim 8
Dependent Claim
55 words
A method according to claim 2 wherein the tube portion is made of polyolefin or similar plastics film with poor adhesive properties, wherein the web of plastics film serving to manufacture the tube portion is subjected to a surface activating preliminary treatment, preferably by corona discharge, in the regions which are later to be stuck.
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) | 1975-09-12 | 1976-03-13 | 1976-09-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-09-12 | 1980-03-13 | 1980-09-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-09-12 | 1984-03-13 | 1984-09-12 | $7700.00 | Window Closed / Lapsed |