US3840254A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Perfect binding
Assignee: Individual
•
Filing: 1972-06-15
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Granted: 1974-10-08
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Expires: 1992-06-15
Abstract
Abstract An improved technique for relieving distortion producing stresses in the binding adhesive applied to perfect bound book bodies of the rounded type. Such stresses tend to destroy the rounded shape of the body. The technique utilizes a hot melt adhesive having dispersed therein particles of a magnetically or dielectrically heatable susceptor. After rounding the signatures, the adhesive is exposed to a indirect energy field to remelt the adhesive and relieve shape distorting stresses induced in the adhesive by the rounding of the body.
Inventors
- 👤 L Shatzkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:20
CPC Classifications
B; B29; B29C; B29C65/00; B29C65/02; B29C65/34; B29C65/36; B29C65/3604; B29C65/3608; B29C65/3612; B29C66/00; B29C66/80; B29C66/83; B29C66/832; B29C66/8322; B29C66/83221; B29C71/00; B29C71/02; B42; B42C; B42C13/00; B42C13/006; B29C65/3672; B29C65/3676; B29C65/368; B29C66/81; B29C66/818; B29C66/8181; B29C66/81811; B29K; B29K2995/00; B29K2995/0003; B29K2995/0008; B29L; B29L2031/00; B29L2031/705; B29L2031/7052
Claims Analysis
Total Claims: 17
Claim 1
Independent Claim
173 words
A METHOD OF FORMING A ROUNDED BOOK BODY OF THE PERFECT BOUND TYPE HAVING ONE OR MORE SIGNATURES AND CHARACTERIZED BY AN ABSENCE OF SHAPE DISTORTING STRESSES IN THE BINDING, SAID METHOD COMPRISING THE STEPS OF: GATHERING THE SIGNATURES TO FORM A GENERALLY SQUARED ASSEMBLAGE HAVING A BACKBONE; APPLYING A BONDING AGENT TO THE BACKBONE OF THE SIGNATURE ASSEMBLAGE TO BIND THE SIGNATURES TOGETHER, SAID BONDING AGENT COMPRISING AN ADHESIVE CARRIER CAPABLE OF ASSUMING A THERMALLY INDUCED STRESS RELIEVING STATE OF PLASTICITY HAVING DISPERSED THEREIN A PARTICULATE FERROMAGNETIC SUSCEPTOR SELECTED FROM A CLASS CONSISTING OF FE2O3, FE3O4 AND CRO2; THEREAFTER ROUNDING THE SQUARED BOUND SIGNATURE ASSEMBLAGE TO CURVEDLY SHAPE THE ASSEMBLAGE BACKBONE, SAID DEFORMATION GENERATING STRESSES IN THE BONDING AGENT TENDING TO RESTORE THE SQUARED SHAPE OF THE ASSEMBLAGE; AND EXPOSING THE BONDING AGENT TO AN ALTERNATING MAGNETIC FIELD TO HEAT THE PARTICULATE SUSCEPTOR AND PLACE THE AGENT IN THE STRESS RELIEVING STATE OF PLASTICITY TO RELIEVE THE SHAPE DISTORTING STRESSES GENERATED IN THE BONDING AGENT BY THE ROUNDING OF THE SIGNATURE ASSEMBLAGE.
Claim 2
Independent Claim
173 words
A METHOD OF FORMING A ROUNDED BOOK BODY OF THE PERFECT BOUND TYPE HAVING ONE OR MORE SIGNATURES AND CHARACTERIZED BY AN ABSENCE OF SHAPE DISTORTING STRESSES IN THE BINDING, SAID METHOD COMPRISING THE STEPS OF: GATHERING THE SIGNATURES TO FORM A GENERALLY SQUARED ASSEMBLAGE HAVING A BACKBONE; APPLYING A BONDING AGENT TO THE BACKBONE OF THE SIGNATURE ASSEMBLAGE TO BIND THE SIGNATURES TOGETHER, SAID BONDING AGENT COMPRISING AN ADHESIVE CARRIER CAPABLE OF ASSUMING A THERMALLY INDUCED STRESS RELIEVING STATE OF PLASTICITY HAVING DISPERSED THEREIN A PARTICULATE FERROMAGNETIC SUSCEPTOR SELECTED FROM A CLASS CONSISTING OF FE2O3, FE3O4 AND CRO2; THEREAFTER ROUNDING THE SQUARED BOUND SIGNATURE ASSEMBLAGE TO CURVEDLY SHAPE THE ASSEMBLAGE BACKBONE, SAID DEFORMATION GENERATING STRESSES IN THE BONDING AGENT TENDING TO RESTORE THE SQUARED SHAPE OF THE ASSEMBLAGE; AND EXPOSING THE BONDING AGENT TO AN ALTERNATING MAGNETIC FIELD TO HEAT THE PARTICULATE SUSCEPTOR AND PLACE THE AGENT IN THE STRESS RELIEVING STATE OF PLASTICITY TO RELIEVE THE SHAPE DISTORTING STRESSES GENERATED IN THE BONDING AGENT BY THE ROUNDING OF THE SIGNATURE ASSEMBLAGE.
Claim 3
Dependent Claim
35 words
The method according to claim 1 including the step of applying pressure to the bound signature assemblage after rounding and during exposure of the bonding agent to hold the signature assemblage in the rounded state.
Claim 4
Dependent Claim
54 words
The method according to claim 1 wherein the carrier is capable of melting upon the application of heat thereto and wherein the step of exposing the bonding agent is further defined as heating the carrier to the molten state by means of the particulate susceptor to place the agent in the stress relieving state.
Claim 5
Dependent Claim
52 words
The method according to claim 3 wherein said bonding agent is applied to the backbone of the signature assemblage in the molten form and is allowed to solidify prior to rounding the bound signature assemblage, exposure of the bonding agent remelting the carrier to place the agent in the stress relieving state.
Claim 6
Dependent Claim
31 words
The method according to claim 1 further defined as including the step of forming the bonding agent by dispersing the susceptor a thermoplastic carrier prior to application to the signature assemblage.
Claim 7
Dependent Claim
31 words
The method according to claim 5 wherein the step of forming the bonding agent is further defined as dispersing up to 50 percent by weight of susceptor material in the carrier.
Claim 8
Dependent Claim
22 words
The method according to claim 5 further defined as dispersing up to 30 percent by weight of susceptor material in the carrier.
Claim 9
Dependent Claim
34 words
The method according to claim 5 wherein the step of forming the bonding agent is further defined as dispersing particles of susceptor material having a minimum particles size of 0.01 microns in the carrier.
Claim 10
Dependent Claim
26 words
The method according to claim 1 further defined as exposing the bonding agent to a magnetic field having a frequency of from 0.4 to 5,000 megahertz.
Claim 11
Dependent Claim
38 words
The method according to claim 1 wherein the bonding agent is applied to the backbone of the signature assemblage in a non adhesive state and is subsequently exposed to an alternating magnetic field to bind the signatures together.
Claim 12
Dependent Claim
24 words
The method according to claim 10 wherein the bonding agent is applied on dry form and is subsequently melted to bind the signatures together.
Claim 13
Dependent Claim
21 words
The method according to claim 10 wherein said bonding agent is applied in granular form to the backbone of the signatures.
Claim 14
Dependent Claim
25 words
The method according to claim 10 wherein the bonding agent is applied in the form of a tape to the backbone of the signature assemblage.
Claim 15
Dependent Claim
33 words
The method according to claim 1 wherein the bonding agent is applied to a portion of the backbone of the signature assemblage and conventional adhesive is applied to other portions of the backbone.
Claim 16
Dependent Claim
24 words
The method according to claim 14 wherein the bonding agent is applied in at least one strip across the backbone of the signature assemblage.
Claim 17
Dependent Claim
23 words
The method according to claim 15 wherein the strip of bonding agent is applied inwardly from the other edges of the book body.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-10-07 | 1978-04-08 | 1978-10-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-10-07 | 1982-04-08 | 1982-10-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-10-07 | 1986-04-08 | 1986-10-08 | $7700.00 | Window Closed / Lapsed |