US4588470A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for applying adhesive to stacked sheets in bookbinding machines
Assignee: Grapha Holding AG
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Filing: 1984-11-15
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Granted: 1986-05-13
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Expires: 2004-11-15
Abstract
Abstract Stacks of paper sheets are transported at a level above a heated paste tank and their lower edge faces are contacted by the upper portion of the peripheral surface of a driven wheel-shaped applicator whose lower portion dips into the supply of paste in the tank and an intermediate portion of which is located above the upper level of the supply of paste and upstream of the upper portion. The intermediate portion of the peripheral surface receives a mixture of paste and air from a spray nozzle which, in turn, receives the mixture from a conduit containing a mixer and a pump and having an intake end immersed in the supply of paste in the tank. The pump draws air or another gas into the conduit by way of a pipe upstream of the mixer, and the latter converts the supplied paste and gaseous fluid into a foam which is delivered to the orifice of the nozzle. The nozzle is preceded by a first doctor which removes paste from the peripheral surface of the applicator ahead of the location where the foam is sprayed by the nozzle, and the nozzle is followed by a second doctor which regulates the thickness of the sprayed-on layer of paste on the applicator.
Inventors
- 👤 Heinz Abegglen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 21:16
CPC Classifications
B; B42; B42C; B42C9/00; B42C9/0006; B42C9/0012; B42C9/0031; Y; Y10; Y10S; Y10S156/00; Y10S156/908; Y10T; Y10T156/00; Y10T156/17; Y10T156/1798
Claims Analysis
Total Claims: 20
Claim 1
Independent Claim
183 words
Apparatus for applying layers of adhesive to selected regions of successive commodities of a series of commodities, particularly to edge faces of stacks of paper sheets in bookbinding machines, comprising means for transporting successive commodities along a predetermined path; an adhesive-containing vessel adjacent a portion of and below said path; a substantially wheel-shaped applicator having a peripheral surface including an upper portion arranged to apply layers of adhesive to the commodities in said path and a second portion above the upper level of adhesive in said vessel; means for rotating said applicator in a direction such that said upper portion is located downstream of said second portion, as considered in said direction; a spray nozzle adjacent to said second portion; a source of gaseous fluid; means for respectively supplying to said nozzle fluid from said source and adhesive from said vessel; and means for mixing the supplied fluid and adhesive ahead of said nozzle without appreciable dissolution of fluid in the adhesive so that the latter sprays a homogeneous foamy mixture of such fluid and adhesive onto the second portion of said surface.
Claim 2
Dependent Claim
183 words
Apparatus for applying layers of adhesive to selected regions of successive commodities of a series of commodities, particularly to edge faces of stacks of paper sheets in bookbinding machines, comprising means for transporting successive commodities along a predetermined path; an adhesive-containing vessel adjacent a portion of and below said path; a substantially wheel-shaped applicator having a peripheral surface including an upper portion arranged to apply layers of adhesive to the commodities in said path and a second portion above the upper level of adhesive in said vessel; means for rotating said applicator in a direction such that said upper portion is located downstream of said second portion, as considered in said direction; a spray nozzle adjacent to said second portion; a source of gaseous fluid; means for respectively supplying to said nozzle fluid from said source and adhesive from said vessel; and means for mixing the supplied fluid and adhesive ahead of said nozzle without appreciable dissolution of fluid in the adhesive so that the latter sprays a homogeneous foamy mixture of such fluid and adhesive onto the second portion of said surface.
Claim 3
Dependent Claim
39 words
The apparatus of claim 1, wherein the peripheral surface of said applicator includes a lower portion which dips into the supply of adhesive in said vessel and is located upstream of said second portion, as considered in said direction.
Claim 4
Dependent Claim
31 words
The apparatus of claim 2, wherein said transporting means includes an endless conveyor and pairs of cooperating gripping devices provided on said conveyor and arranged to engage and advance discrete commodities.
Claim 5
Dependent Claim
60 words
The apparatus of claim 2, further comprising means for regulating the upper level of the supply of adhesive in said vessel so that the location of application of the spray of adhesive to the second portion of said peripheral surface is invariably located above and a part at least of said lower portion is invariably located below such upper level.
Claim 6
Dependent Claim
35 words
The apparatus of claim 2, wherein said supplying means comprises a conduit which has an intake end in the supply of adhesive in said vessel and means for drawing fluid and adhesive into said conduit.
Claim 7
Dependent Claim
30 words
The apparatus of claim 5, wherein said mixing means is disposed downstream of said drawing means, as considered in the direction of flow of adhesive and fluid toward said nozzle.
Claim 8
Dependent Claim
44 words
The apparatus of claim 6, wherein said drawing means comprises a pump and said source includes a pipe having an intake end outside of the supply of adhesive in said vessel and a discharge end communicating with said conduit upstream of said mixing means.
Claim 9
Dependent Claim
25 words
The apparatus of claim 7, wherein said mixing means and said pump are at least partly immersed in the supply of adhesive in said vessel.
Claim 10
Dependent Claim
18 words
The apparatus of claim 7, wherein the discharge end of said pipe is located upstream of said pump.
Claim 11
Dependent Claim
33 words
The apparatus of claim 1, wherein said nozzle has an elongated orifice extending at least substantially across the full width of said second portion, as considered in the axial direction of said applicator.
Claim 12
Dependent Claim
43 words
The apparatus of claim 1, further comprising means for regulating the thickness of the adhesive containing layer on the peripheral surface of said applicator downstream of said nozzle and upstream of the location of application of adhesive to the commodities in said path.
Claim 13
Dependent Claim
24 words
The apparatus of claim 11, wherein said regulating means comprises an intercepting blade and means for moving said blade substantially radially of said applicator.
Claim 14
Dependent Claim
56 words
The apparatus of claim 1, wherein the peripheral surface of the applicator further includes a lower portion which is located upstream of said second portion, as considered in said direction, and further comprising means for removing adhesive, if any, from said lower portion so that said second portion is devoid of adhesive upstream of said nozzle.
Claim 15
Dependent Claim
22 words
The apparatus of claim 13, wherein the lower portion of said peripheral surface dips into the supply of adhesive in said vessel.
Claim 16
Dependent Claim
41 words
The apparatus of claim 13, wherein said removing means includes a blade having an edge in contact with the peripheral surface of said applicator upstream of said nozzle and above the upper level of the supply of adhesive in said vessel.
Claim 17
Dependent Claim
58 words
The apparatus of claim 1, further comprising means for heating the supply of adhesive in said vessel, the peripheral surface of said applicator further having a lower portion dipping into the supply of adhesive in said vessel upstream of said second portion, as considered in said direction, so that the applicator exchanges heat with the supply of adhesive.
Claim 18
Dependent Claim
39 words
The apparatus of claim 1, further comprising means for heating the supply of adhesive in said vessel, at least a portion of said mixing means being arranged to exchange heat with the supply of heated adhesive in said vessel.
Claim 19
Dependent Claim
39 words
The apparatus of claim 1, further comprising means for heating the supply of adhesive in said vessel, at least a portion of said supplying means being arranged to exchange heat with the supply of heated adhesive in said vessel.
Claim 20
Dependent Claim
54 words
The apparatus of claim 1, further comprising means for regulating the thickness of the adhesive containing layer on the peripheral surface of said applicator downstream of said nozzle and upstream of the location of application of adhesive to the commodities in said path, including means for returning the surplus of adhesive into said vessel.
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) | 1989-05-12 | 1989-11-11 | 1990-05-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-05-12 | 1993-11-11 | 1994-05-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-05-12 | 1997-11-11 | 1998-05-13 | $7700.00 | Window Closed / Lapsed |