Claims
- 1. An apparatus for producing a substrate having an extended action adhesive for delayed use thereof, said apparatus comprising:
- a frame;
- a reservoir for containing heated adhesive in a flowable state operably positioned with respect to said frame;
- adhesive supply means including a discharge orifice extending from said reservoir;
- means for establishing relative movement between a substrate and said adhesive discharge orifice;
- means for controlling the discharge of adhesive as strands on onto said substrate extending longitudinally in the direction of movement of said substrate;
- means for cooling said adhesive strand on said substrate to decrease the adhesion properties of its the exposed surface of said strand;
- means for dispensing a thin protective strip onto said strand downstream of said orifice, said strip being substantially coextensive with said strand and formed of material which is substantially impermeable to the adhesive and poorly sensitive to the action thereof;
- means for applying pressure simultaneously to said protective strip and to said adhesive strand following cooling thereof of said strand for spreading the adhesive across with respect to said substrate; and
- means for removing said substrate from said frame following reception of said adhesive.
- 2. The apparatus of claim 1 in which said pressure-applying means comprises a rotatable roller having an axis of rotation substantially perpendicular to the length of said strip operably positioned with respect to said frame for engagement with said protective strip adhesive strand to press it and said strand in the direction of said substrate.
- 3. The apparatus of claim 2 including means for adjustably positioning said roller with respect to said frame for varying the pressure applied to said adhesive strand.
- 4. The apparatus of claim 2 in which said roller comprises a substantially cylindrical body mounted for rotation with respect to said frame; and means forming knurling on the circumferential surface of said body.
- 5. The apparatus of claim 4 including means for rotatably driving said roller body.
- 6. The apparatus of claim 1 in which said discharge orifice and said pressure-applying means are disposed in longitudinally spaced relation in an ambient atmosphere for cooling of said adhesive strand prior to pressing.
- 7. The apparatus of claim 6 including means disposed between said discharge orifice and said pressure-applying means for positively applying a cooling fluid to said adhesive strand.
- 8. The apparatus of claim 2 including means for controlling the pressure applied to said strand for limiting its spread to an extent within the edges of said strip.
- 9. The apparatus of claim 1 in which said substrate is formed of compressible material and including means disposed upstream of said discharge orifice for pressing said substrate to produce a recess therein elongated in the direction of movement of said substrate for reception of said adhesive strand.
- 10. The apparatus of claim 1 in which said substrate is formed of compressible material and including means disposed upstream of said discharge orifice for pressing said substrate to produce an elongated recess therein for receiving said adhesive strand, said recess having a depth at least as great as the combined thickness of the pressed adhesive strand and the protective strip received therein.
- 11. The apparatus of claim 1 in which said substrate is in the form of a continuous elongated body of material; a discharge roll and take-up roll disposed at opposite ends of said frame; and means for driving at least one of said rolls for moving said substrate with respect to said frame.
- 12. The apparatus of claim 1 in which said substrate is in the form of separate panels; means disposed at opposite ends of said frame for receiving stacks of panels, said stacks including a supply stack at one end of said frame and a product stack at the other end thereof; and means for moving individual panels sequentially from said supply stack into operative relation with said adhesive supply orifice for controllably depositing said adhesive onto said substrate panels in strands extending substantially continuously between opposite edges of each said panel.
- 13. The apparatus of claim 11 including means for dispensing a protective strip onto said adhesive strands on each of said panels; and cutting means for severing said strip.
- 14. The apparatus of claim 13 in which said cutting means is arranged to simultaneously cut said strip and a portion of said substrate adjacent said opposite edges of said panels.
- 15. (Amended) The apparatus of claim 13 in which said protective strip is dispensed continuously with respect to said substrate panels and said cutting means is arranged to sever said strip intermediate facing edges of adjacent panels.
- 16. The apparatus of claim 1 including heating means associated with said reservoir for maintaining adhesive therein in a flowable state.
- 17. The apparatus of claim 16 including conduit means for circulating adhesive in a closed circuit with respect to said reservoir; a duct containing said discharge orifice communicating with said conduit; and valve means on said duct for controlling the discharge of adhesive onto said substrate.
- 18. The apparatus of claim 17 including heating means associated with said duct for heating the adhesive passed therethrough to said discharge orifice.
- 19. The apparatus of claim 6 in which said discharge orifice is arranged for elevated disposition with respect to said substrate, said orifice being of generally circular cross section for the supply of adhesive in a downward stream of generally circular cross section onto said substrate.
- 20. An apparatus for producing a substrate having an extended-action adhesive thereon and a detachable strip covering said adhesive prior to use thereof, said apparatus comprising:
- a frame having an operating surface thereon;
- a reservoir for containing adhesive therein;
- means for heating the adhesive in said reservoir to maintain it in a flowable state;
- adhesive supply means extending from said reservoir including a discharge orifice operably positioned above said operating surface;
- means for moving a substrate across said operating surface with respect to said discharge orifice to receive a strand of adhesive therefrom which extends in the direction of movement of said substrate;
- means for cooling said adhesive strand on said substrate to increase the viscosity of the exposed surface of said strand and thereby reduce the adhesion properties thereof to a value less than the adhesion existing between said strand and said substrate;
- means for dispensing a strip of thin material that is impermeable to said adhesive and poorly sensitive to the adhesive action thereof and for applying it substantially coextensively with said strand; and
- means positioned downstream in the substrate-moving sense and operative for engaging said thin protective strip for pressing it and compressing said strand to spread both laterally and longitudinally.
- 21. The apparatus according to claim 20 in which said strand compressing means comprises a rotatable roller having an axis of rotation substantially perpendicular to said strip positioned to dispose said strip between said roller and said adhesive strand, whereby said strip is applied and said strand is simultaneously compressed to spread longitudinally and laterally between opposed edges of said strip.
- 22. The apparatus according to claim 20 in which said substrate is formed of a cardboard material having a generally flexible alveolated internal structure and including means disposed upstream from said discharge orifice in the substrate-moving sense for compressing said substrate to weaken the internal structure, but not destroy the flexibility thereof, and produce an elongated recess for reception of said adhesive strand.
- 23. The apparatus according to claim 22 in which said substrate compressing means comprises a roller having an axis of rotation substantially perpendicular to the direction of movement of said substrate and an operating surface engageable therewith; and means for controlling the extent of application of said roller to produce a recess whose depth corresponds substantially to the cumulative thickness of said strand and said protective strip received therein.
- 24. The apparatus according to claim 23 in which said adhesive supply means comprises a conduit for circulating said adhesive in a closed circuit to and from said reservoir and a duct having valve means therein and terminating in said discharge orifice.
- 25. The apparatus according to claim 23 including means for heating said duct.
- 26. The apparatus according to claim 19 in which said substrate is in the form of a continuous elongated body of material; a discharge roll and a take-up roll disposed at opposite ends of the operating surface on said frame; and means for driving at least one of said rolls for moving said substrate with respect to said operating surface.
- 27. The apparatus according to claim 19 in which said substrate is in the form of separate panels; means disposed at opposite ends of said operating surface for receiving stacks of panels including a supply stack at one end of said operating surface and a product stack at the other end thereof; and means for moving individual panels from said supply stack sequentially along said operating surface.
- 28. The apparatus according to claim 27 including means for dispensing said strip continuously with respect to said moving substrate panels; and cutting means arranged to sever said strip to separate said panels.
Priority Claims (2)
Number |
Date |
Country |
Kind |
89 08650 |
Jun 1989 |
FRX |
|
PCT/FR90/00482 |
Jun 1990 |
WOX |
|
Parent Case Info
This application is a division of application Ser. No. 07/656,177, filed Apr. 23, 1991; which is a U.S. national phase of PCT/FR90/00482, filed Jun. 28, 1990 now U.S. Pat. No. 5,350,477.
US Referenced Citations (8)
Foreign Referenced Citations (1)
Number |
Date |
Country |
0536518 |
Apr 1993 |
EPX |
Divisions (1)
|
Number |
Date |
Country |
Parent |
656177 |
Apr 1991 |
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