US4559250A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Contamination-control mats
Assignee: Illinois Tool Works Inc
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Filing: 1984-03-21
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Granted: 1985-12-17
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Expires: 2004-03-21
Abstract
Abstract A tacky mat stack employing sheets 0.4 mil to 2.5 mils thick of either high-density polyethylene or linear low-density polyethylene or low-density polyethylene, each sheet having been treated electronically on both sides, one side having about twice the dyne level of the other, and adhesive on the side having the higher dyne level. The adhesion pull load may vary from about 1/2 ounce to about 10 ounces per lineal inch.
Inventors
- 👤 Raymond J. Paige
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 23:59
CPC Classifications
A; A47; A47L; A47L23/00; A47L23/22; A47L23/26; A47L23/266; A61; A61B; A61B90/00; Y; Y10; Y10T; Y10T156/00; Y10T156/11; Y10T156/1153; Y10T156/1158; Y10T428/00; Y10T428/14; Y10T428/1452; Y10T428/26; Y10T428/263; Y10T428/264; Y10T428/28; Y10T428/2809
Claims Analysis
Total Claims: 14
Claim 1
Independent Claim
94 words
A tacky mat stack employing a stacked series of sheets of either high-density polyethylene or linear low-density polyethylene or non-linear low density polyethylene each sheet having been treated electronically on both sides, and adhesive coated on its upper side, said upper side having about twice the dyne level of electronic treatment of the lower, non-adhesive coated side, to provide preferential action that enables trouble-free sheet separation during removal of each uppermost sheet from said stack while also avoiding loss of the adhesive coating from the sheets below and preventing premature delamination of said stack.
Claim 2
Dependent Claim
94 words
A tacky mat stack employing a stacked series of sheets of either high-density polyethylene or linear low-density polyethylene or non-linear low density polyethylene each sheet having been treated electronically on both sides, and adhesive coated on its upper side, said upper side having about twice the dyne level of electronic treatment of the lower, non-adhesive coated side, to provide preferential action that enables trouble-free sheet separation during removal of each uppermost sheet from said stack while also avoiding loss of the adhesive coating from the sheets below and preventing premature delamination of said stack.
Claim 3
Dependent Claim
24 words
The stack of claim 1 wherein the adhesive has an adhesion pull of from about one-half ounce to about ten ounces per lineal inch.
Claim 4
Dependent Claim
31 words
The stack of claim 1 wherein the electronic treatment on the adhesive side is about 40 to 50 dynes and that on the non-adhesive side is about 10 to 30 dynes.
Claim 5
Dependent Claim
18 words
The stack of claim 1 wherein the sheets are from about 0.4 mil to about 2.5 mils thick.
Claim 6
Dependent Claim
92 words
A tacky mat stack employing a stacked series of sheets 0.4 mil to 2.5 mils thick of high-density polyethylene, each sheet having been treated electronically on both sides, the upper side of each sheet being adhesive coated and having about twice the dyne level of electronic treatment of the lower side, which has no adhering to provide preferential action that enables trouble-free sheet separation during removal of an upper sheet from said stack while also avoiding loss of the adhesive coating on the sheets therebelow and preventing premature delamination of said stack.
Claim 7
Dependent Claim
92 words
A tacky mat stack employing a stacked series of sheets 0.4 mil to 2.5 mils thick of high-density polyethylene, each sheet having been treated electronically on both sides, the upper side of each sheet being adhesive coated and having about twice the dyne level of electronic treatment of the lower side, which has no adhering to provide preferential action that enables trouble-free sheet separation during removal of an upper sheet from said stack while also avoiding loss of the adhesive coating on the sheets therebelow and preventing premature delamination of said stack.
Claim 8
Dependent Claim
19 words
The stack of claim 5 wherein the adhesive has a pull load of about 1/2 to about 10 ounces.
Claim 9
Dependent Claim
94 words
A tacky mat stack employing a stacked series of sheets, each 0.4 mil to 2.5 mils thick, of linear low-density polyethylene, each sheet having been treated electronically on both sides and having adhesive applied to the upper side only, the upper adhesive coated side having about twice the dyne level of electronic treatment of the lower side, to provide preferential action that enables trouble-free sheet separation during removal of an upper sheet from the stack while also avoiding loss of the adhesive coating on the sheet therebelow and preventing premature delamination of said stack.
Claim 10
Dependent Claim
94 words
A tacky mat stack employing a stacked series of sheets, each 0.4 mil to 2.5 mils thick, of linear low-density polyethylene, each sheet having been treated electronically on both sides and having adhesive applied to the upper side only, the upper adhesive coated side having about twice the dyne level of electronic treatment of the lower side, to provide preferential action that enables trouble-free sheet separation during removal of an upper sheet from the stack while also avoiding loss of the adhesive coating on the sheet therebelow and preventing premature delamination of said stack.
Claim 11
Dependent Claim
24 words
The stack of claim 7 wherein the adhesive has an adhesion pull of from about one-half ounce to about ten ounces per lineal inch.
Claim 12
Dependent Claim
94 words
A tacky mat stack employing a stacked series of sheets 0.4 mil to 2.5 mils thick of non-linear low-density polyethylene, each sheet having been treated electronically on both sides and having tacky adhesive applied only to its upper side, the upper, adhesive coated side having about twice the dyne level of electronic treatment of the lower side to provide preferential action that enables trouble-free sheet separation during removal of an upper sheet from the stack while also avoiding loss of the adhesive coating on the sheet therebelow and preventing premature delamination of said stack.
Claim 13
Dependent Claim
94 words
A tacky mat stack employing a stacked series of sheets 0.4 mil to 2.5 mils thick of non-linear low-density polyethylene, each sheet having been treated electronically on both sides and having tacky adhesive applied only to its upper side, the upper, adhesive coated side having about twice the dyne level of electronic treatment of the lower side to provide preferential action that enables trouble-free sheet separation during removal of an upper sheet from the stack while also avoiding loss of the adhesive coating on the sheet therebelow and preventing premature delamination of said stack.
Claim 14
Dependent Claim
24 words
The stack of claim 9 wherein the adhesive has an adhesion pull of from about one-half ounce to about ten ounces per lineal inch.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-12-16 | 1989-06-17 | 1989-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-12-16 | 1993-06-17 | 1993-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-12-16 | 1997-06-17 | 1997-12-17 | $7700.00 | Window Closed / Lapsed |