Patent US3685857A successfully refreshed from Google Patents.
US3685857A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Bookbinding
Assignee: RCA Corp
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Filing: 1969-09-19
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Granted: 1972-08-22
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Expires: 1989-09-19
Abstract
Abstract A stack of printed sheets, ready for binding, is formed with a plurality of grooves across the edge thereof to be bound. An elastic member, formed with a like plurality of projecting ridges, is subjected to a force which contracts the ridges to a size sufficient to enable them to be fitted within the grooves. Upon removal of the force from the elastic member, the ridges revert toward their original configuration causing them to be lodged within the grooves thereby securing the stack of sheets as an assemblage.
Inventors
- 👤 Ernest William Schlieben
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:09
CPC Classifications
B; B42; B42D; B42D3/00; B42C; B42C5/00; B42C5/04; Y; Y10; Y10S; Y10S402/00; Y10S402/501
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
224 words
A method of interconnecting a stack of sheets at an edge thereof comprising the steps of: a. forming said edge with a plurality of elongated recesses, each recess being shaped to interlock with a complementary projection inserted therein, b. aligning said recesses with a plurality of interlocking projections which are like in number and complementary in shape to said recesses and which are formed from and integral with an elastic member, said elastic member having portions extending beyond opposite ends of said projections, each projection corresponding to a separate different recess, the shape of each of said projections tending to prevent the insertion thereof into the corresponding recess, c. applying a force to said extending portions of said elastic member to resiliently distort the shape of said projections to permit their insertion into said recesses, d. inserting the distorted projections into their respective, corresponding recesses, and e. removing the force from said elastic member to cause said projections to substantially assume said inter-lock shape to thereby secure said member to said stack said recesses being grooves extending substantially parallel with respect to each other through all of said sheets, said inserting step including inserting said projections in a direction substantially normal to said grooves, and said force applying step including applying said force to said member in a direction different than said normal direction.
Claim 2
Independent Claim
224 words
A method of interconnecting a stack of sheets at an edge thereof comprising the steps of: a. forming said edge with a plurality of elongated recesses, each recess being shaped to interlock with a complementary projection inserted therein, b. aligning said recesses with a plurality of interlocking projections which are like in number and complementary in shape to said recesses and which are formed from and integral with an elastic member, said elastic member having portions extending beyond opposite ends of said projections, each projection corresponding to a separate different recess, the shape of each of said projections tending to prevent the insertion thereof into the corresponding recess, c. applying a force to said extending portions of said elastic member to resiliently distort the shape of said projections to permit their insertion into said recesses, d. inserting the distorted projections into their respective, corresponding recesses, and e. removing the force from said elastic member to cause said projections to substantially assume said inter-lock shape to thereby secure said member to said stack said recesses being grooves extending substantially parallel with respect to each other through all of said sheets, said inserting step including inserting said projections in a direction substantially normal to said grooves, and said force applying step including applying said force to said member in a direction different than said normal direction.
Claim 3
Dependent Claim
102 words
The method of claim 1 wherein a cross sectional area of each projection is normally greater than the complementary cross sectional area of the corresponding recess when said member is in a relaxed state, said force applying step including the step of applying a force to said elastic member to resiliently reduce said cross sectional area of each of said projections to a value less than the value of said complementary cross sectional area of said corresponding recesses, said inserted projections being resiliently compressed against said stack when said reducing force is removed to thereby closely secure said member to said stack.
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) | 1975-08-22 | 1976-02-21 | 1976-08-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-22 | 1980-02-21 | 1980-08-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-22 | 1984-02-21 | 1984-08-22 | $7700.00 | Window Closed / Lapsed |