US3579849A - Heat setting of footwear - Google Patents

Heat setting of footwear Download PDF

Info

Publication number
US3579849A
US3579849A US762234A US3579849DA US3579849A US 3579849 A US3579849 A US 3579849A US 762234 A US762234 A US 762234A US 3579849D A US3579849D A US 3579849DA US 3579849 A US3579849 A US 3579849A
Authority
US
United States
Prior art keywords
chamber
air
heating
heat
footwear
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
US762234A
Other languages
English (en)
Inventor
Alfred Freeman
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Application granted granted Critical
Publication of US3579849A publication Critical patent/US3579849A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B15/00—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form
    • F26B15/10—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions
    • F26B15/12—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined
    • F26B15/14—Machines or apparatus for drying objects with progressive movement; Machines or apparatus with progressive movement for drying batches of material in compact form with movement in a path composed of one or more straight lines, e.g. compound, the movement being in alternate horizontal and vertical directions the lines being all horizontal or slightly inclined the objects or batches of materials being carried by trays or racks or receptacles, which may be connected to endless chains or belts
    • A—HUMAN NECESSITIES
    • A43—FOOTWEAR
    • A43D—MACHINES, TOOLS, EQUIPMENT OR METHODS FOR MANUFACTURING OR REPAIRING FOOTWEAR
    • A43D95/00—Shoe-finishing machines
    • A43D95/12—Devices for conditioning, tempering, or moistening
    • A43D95/125—Devices for conditioning, tempering, or moistening with means, e.g. transport chains, for continuously transferring shoes through the devices
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F26—DRYING
    • F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
    • F26B21/00—Arrangements or duct systems, e.g. in combination with pallet boxes, for supplying and controlling air or gases for drying solid materials or objects
    • F26B21/06—Controlling, e.g. regulating, parameters of gas supply

Definitions

  • ABSTRACT Heat-setting footwear by advancing same [51] Int. Cl F26b 19/00 through closed chamber in which hot, moisture-saturated air [50] Field of Search 34/26, 28, is circulated. Moisture saturation maintained by hot air 46, 50, 212, 215, 216, 219, 224, 225, 48; 12/1 (A), passing over shallow evaporation tank continuously supplied 41.5, 59.7 with water via a ball valve. Air-heating coils in chamber controlled by temperature-responsive device adjacent footwear [5 6] References C'ted being treated so as to maintain temperature constant.
  • the present invention provides a method of heat setting footwear (which term includes complete articles of footwear or components thereof at any convenient stage of manufacture, preparation, or after-treatment) in which the footwear is advancedlat a controlled rate through a chamber in which hot air is circulated and maintained at a preset temperature and pressure and is kept moisture-saturated for this temperature and pressure.
  • the invention further provides an apparatus for heat-setting footwear, which includes relatively simple and convenient means to maintain the moisture-saturation of the air.
  • This comprises a closed chamber having means for producing a circulation of air therein, means for heating the air and an evaporation device which is heated by the circulating air and is adapted to be continuously supplied withwater for evaporation by the device.
  • the hot air in circulating, heats up the evaporation device and water which evaporates.
  • the temperature of the latter reaches 1 100 C. it starts to boil.
  • the moisture content of the air continues to increase andfootwear into the chamber, is started so that the work is ad-- vanced through an atmosphere which is maintained constantly maximum-saturated.
  • the duration of the treatment can be controlled by varying the speed of the'conveyor and this in turn depends on the temperature in the chamber and the nature of the work.
  • the evaporator device may simply comprise a shallow trough or tank which is supplied with water through a ball valve arranged to maintain a shallow covering of water over the' bottom of the tank or trough.
  • a pump may be provided to produce a circulation or water in the tank or trough to assist the evaporation.
  • the tank or trough is adapted to be heated by means additional to the hot air.
  • it may be positioned in the chamber, adjacent the air heaters. Where one side of the tank or trough is so positioned, a temperature differential is set up between the opposite sides thereof. This sets up convection currents which cause the water to circulate and thereby obviate the need for a circulatory water pump.
  • the evaporator device in question may comprise a corrugated sheet of .copper or other conductive material and hot water is trickled down' the grooves in this sheet, which for the purpose may be arranged vertically, inclined to the vertical, or even in substantially horizontal disposition.
  • a sprinkler tube may be arranged above this sheet, with its discharge orifices positioned to direct water from the tube down the valleys in the plate, to be collected in a header at the bottom of the. plate and returned, by a circulating pump to the sprinkler tube.
  • FIG. I is a front view, with the front wall omitted, of an apparatus for heat-setting footwear, constructed in accordance with the invention
  • FIG. 2 is a vertical sectional view on line II-ll of FIG. 1,
  • FIG. 3 is a front view showing a unit construction footwear treatment station incorporating a modified. form of heatsetting chamber of the kind illustrated in FIGS. 1 and 2 in conjunction with a chain conveyor,
  • FIG. 4 is a vertical sectional view on line IV-IV ofv FIG. 3, and
  • FIG. 5 is a schematic circuit diagram of the control circuit for theheating coils of FIG. 1.
  • FIGS. 1 and 2 The apparatus shown'in FIGS. 1 and 2 is positioned at an appropriate point along a chain conveyor 1 with the latter passing through it and carryingfootwear F to be treated by the apparatus.
  • the .latter comprises achamber 2 constituted by a.
  • compartment6 isdeeper from back to front than chamber 2, extending beyond the rear wall thereof.
  • Chain conveyor 1 extends through the upper part of the chamber 2 from end to end thereof and,.as mentioned above, carries footwear F for'heat setting.
  • the end walls of chamber 2 above the'compartment 6 are closed by flap doors 7 which allow the conveyor- 1 to pass therethrough but which discourage loss of hot air.
  • These doors are in the embodiment illustrated, constituted by metal strips 8 arranged side by side to form a continuous curtain and depending from a rod 9 between the front and'rear walls of the chamber.
  • Two such flap doors 7 are provided at each end of the chamber and-are arranged one above the other.
  • Two vertical partitions l0-extend rearwardly from thefront wallof compartment 6 eachat a position approximately a third of the way along the. wall, and terminate at positions immediately belowthe rear wall of chamber 1'.
  • Each partition 10 is of a depth'equal to that offthe compartment.
  • a-pair of narrow elongate chambers 11 Positioned inwardlyv of partitions 10 and defining with-the latter, a-pair of narrow elongate chambers 11, are a further pair of partitions 12. These partitions extend downwardly from the horizontal partition 5 over approximately two-thirds of the depth of com partment 6' and rearwardly fromthe front wall'of the-latter, terminating at their rear edges, level with the partitions 10.
  • a rectangular aperture 13 is provided in the horizontal partition 5 above each chamber 11 and is of the same size as the cross section of the latter. Positioned a short distance above each aperture and secured between the front and rear walls of chamber 1' is a cover plate 14, gauze grill15'being provided between the'longitudinal edges of each cover plate and the partition 5.
  • a rectangular aperture 16 similar toapertures 13 and parallel thereto, is also'provided in-partition 5 in each part thereof between the-relevant end wall of the chamber 2 and the adjacent partition 10. Securedwithin each of the apertures 16 are a plurality of closely-spaced jet tubes 17 which direct air-through the partition 5 as will be explained.
  • each of the above-mentionedv chambers 11 Located in each of the above-mentionedv chambers 11 are a plurality of electrical heating coils 18 for heating air in thesehorizontal partition 5. Tubes 17 ensure that the air is expelled.
  • a temperature-responsive device of conventional form shown diagrammatically in FIG. I at 20,- is provided in the chamber 2 in the path of the circulatingair. This device is connected in the electrical supply to the heating; coils I8 and.
  • the output of a pair of heater coils 18 is controlled by a switch S1 responsive to the temperature-responsive device 20 of FIG. 1.
  • Switch S1 is connected in shunt with one coil of the two coils 18 and selectively shorts out that coil responsive to movement of temperature-responsive device 20.
  • a further switch 26, connected in series with heater coils 18, is discussed hereinbelow.
  • a shallow metal trough or tank 21 is welded at one side to the exterior surface of the partition 10 shown at the right-hand side of FIG. 1. .
  • Water is supplied to the tank 21 from a water main (not shown) through a ball valve 22 which controls the water flow so as to maintain a depth of about l inch of water on the bottom of the tank.
  • the water is heated by the circulation of hot air in chamber 2 and, in addition, the water at the end of the tank adjacent the partition 10, is heated by the heating coils 18 in chamber 11. The water at this end of the tank therefore eventually boils.
  • the temperature differential existing between the opposite ends of the tank causes convection currents to be set up so that the water circulates. After a time, the water boils throughout the tank. The temperature of the water is maintained by the increasingly hot air.
  • the air temperature reaches the value preset by the device 20, it remains at this level and the air continues to pick up moisture until it is fully saturated for that temperature and pressure.
  • the duration of this treatment can be controlled by selection of the speed of advance of the conveyor. It may be found advantageous to provide for periods of dwell in the movement of chain to cater for a prescribed treatment period.
  • the latter may be connected to the driving means of the conveyor I and may serve to regulate its speed according to the prevailing temperature in the chamber 2, i.e. the higher the temperature, the faster the conveyor would be driven, so that each footwear article is treated for a progressively shorter period as the temperature rises.
  • a flap 23 secured to a spindle 24 turnably mounted in, and projecting through, the rear wall of the chamber 2 is positioned in the airstream adjacent the partition 10 shown at the lefthand side of FIG. 1.
  • an arm 25 is fixed to spindle 24 and a switch 26 mentioned above is positioned forcontact by this arm.
  • the arrangement is such that the air flow past flap 23 normally maintains it in position in which arm 25 is held away from switch 26.
  • switch 26 is connected in series in the electrical supply to the heater coils 18 so as to switch them ofi' in the event that the airflow stops.
  • FIGS. 3 and 4 show heat setting apparatus including two heated chambers incorporating part of a chain conveyor system.
  • This apparatus is of unit construction for easy assembly and also to enable its size to be easily varied, four units being illustrated.
  • Each unit comprises an inverted channel-section member 27 arranged in a horizontal disposition and having a track-section 28 for the wheels of a conveyor 1 welded to the interior surface of its outer wall.
  • a circular-section rod 29 having a threaded spigot 29 a projecting from each end is arranged vertically adjacent each end of each member 27, the spigot at the relevant end of each rod passing through a complementary hole in the base of the channel member adjacent the inner wall 21b and being retained by a nut 30.
  • a sheet metal plate 31 is welded between these upright rods and forms a back member.
  • the lower spigots 29a pass through holes in a horizontal base plate 32 disposed parallel to and directly below the base of member 27, an upstanding lip 32a being provided along its outer longitudinal edges.
  • a sheet metal cover or facing 33 is arranged to be bolted to the outer wall 27a of channel member 27 and to lip 32a to cover in the front of each unit.
  • the base plate 32 of the extreme right-hand unit and of the next but one unit thereto each constitute the top of a compartment identical with the compartment 6 shown in FIGS. 1 and 2, i.e. each alternate unit is in the form of a heat chamber capable of providing a circulation of moisture laden air.
  • the conveyor track incorporated in the units bolts directly onto external continuation track sections 35 of the conveyor system, these track sections 35 being arranged to slope downwards from the point of connection with the units as can be seen. Since hot air rises, this inclination of the external sections, ensures that when the apparatus is in operation, the hot air produced by the heat chamber units is trapped, being retained by the channel members 27 and the facing covers 33 and being prevented from escaping at the ends of the assembly by the downwardly-sloping external sections. It will be appreciated that there are no partitions between adjacent units, the hot air flowing along therebetween.
  • the water supply to one of the heat chamber units may be terminated if desired, so that one wet" and one dry heat chamber is employed.
  • one or more of the walls of the chamber may incorporate a heat insulating material so as to minimize heat losses therethrough.
  • the walls may be constituted by reinforced plastics mouldings incorporating heat insulating material.
  • the front and rear walls 4 and in the other embodiment, the covers or facings 33 may each be made of such a moulding.
  • Apparatus for use in the heat setting of complete articles of footwear or components thereof comprising a heat-setting chamber through which said articles or components are advanced; means for producing a circulation of air in said chamber; means for heating the air; an evaporation device which is heated by the circulating air; means for supplying water to the device for evaporation thereby; a flap positioned in the path of the circulating air; a spindle turnably mounted in a wall of the heat-setting chamber and carrying said flap; and a switch which controls said means for heating the air and is arranged to be operated in response to turning of said spindle so as to switch off said heating means in the event that the air circulation is obstructed as detected by return of the flap to a rest position.
  • Apparatus according to claim 1 wherein the ends of the heat-setting chamber are provided with at least one flap door which comprises a curtain of metal strips suspended side by side from their upper ends so as to discourage heat loss through the ends of the chamber whilst allowing the passage therethrough of a conveyor carrying articles of footwear or footwear components by deflection of at least one of said strips.
  • Apparatus according to claim 1 wherein the evaporation device comprises a shallow tank, and wherein the means for supplying water to the device comprises a ball valve in the tank arranged to maintain a shallow covering of water over the bottom of the latter.
  • said heating means are constituted by electrical heating coils positioned in at least one heating chamber within the heat setting chamber and wherein the means for producing a circulation of air com-

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Treatment Of Fiber Materials (AREA)
  • Drying Of Solid Materials (AREA)
US762234A 1967-09-21 1968-09-16 Heat setting of footwear Expired - Lifetime US3579849A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB4290967 1967-09-21

Publications (1)

Publication Number Publication Date
US3579849A true US3579849A (en) 1971-05-25

Family

ID=10426505

Family Applications (1)

Application Number Title Priority Date Filing Date
US762234A Expired - Lifetime US3579849A (en) 1967-09-21 1968-09-16 Heat setting of footwear

Country Status (2)

Country Link
US (1) US3579849A (enrdf_load_stackoverflow)
GB (1) GB1238024A (enrdf_load_stackoverflow)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3976122A (en) * 1975-03-31 1976-08-24 Mcgraw-Edison Company Combination refrigerator-thawer apparatus
WO1995023530A1 (en) * 1994-03-03 1995-09-08 British United Shoe Machinery Limited Apparatus for use in the treatment of workpieces

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1853419A (en) * 1926-01-15 1932-04-12 Ind Dryer Corp Process and apparatus for humidifiers
US2182620A (en) * 1938-05-18 1939-12-05 B F Sturtevant Co Humidifying system
US2201389A (en) * 1939-08-26 1940-05-21 Give Louis P De Moisture box
US2255714A (en) * 1940-05-29 1941-09-09 Rodelli Michael Screen
US2295475A (en) * 1939-08-04 1942-09-08 Proctor & Schwartz Inc Hat drier
US2363715A (en) * 1941-01-25 1944-11-28 B B Chem Co Method of tempering leather
US2552387A (en) * 1947-08-11 1951-05-08 John S Whinery Storage cabinet having humidity and temperature maintenance apparatus therein
US3220033A (en) * 1962-03-06 1965-11-30 Morton S Bromfield Apparatus for treating shoe uppers
US3249150A (en) * 1963-12-11 1966-05-03 Silsby H Knight Curtain for a dishwasher

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1853419A (en) * 1926-01-15 1932-04-12 Ind Dryer Corp Process and apparatus for humidifiers
US2182620A (en) * 1938-05-18 1939-12-05 B F Sturtevant Co Humidifying system
US2295475A (en) * 1939-08-04 1942-09-08 Proctor & Schwartz Inc Hat drier
US2201389A (en) * 1939-08-26 1940-05-21 Give Louis P De Moisture box
US2255714A (en) * 1940-05-29 1941-09-09 Rodelli Michael Screen
US2363715A (en) * 1941-01-25 1944-11-28 B B Chem Co Method of tempering leather
US2552387A (en) * 1947-08-11 1951-05-08 John S Whinery Storage cabinet having humidity and temperature maintenance apparatus therein
US3220033A (en) * 1962-03-06 1965-11-30 Morton S Bromfield Apparatus for treating shoe uppers
US3249150A (en) * 1963-12-11 1966-05-03 Silsby H Knight Curtain for a dishwasher

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3976122A (en) * 1975-03-31 1976-08-24 Mcgraw-Edison Company Combination refrigerator-thawer apparatus
WO1995023530A1 (en) * 1994-03-03 1995-09-08 British United Shoe Machinery Limited Apparatus for use in the treatment of workpieces

Also Published As

Publication number Publication date
GB1238024A (enrdf_load_stackoverflow) 1971-07-07

Similar Documents

Publication Publication Date Title
US3424231A (en) Environmental chamber
DE202007000648U1 (de) Wäschetrockner mit Zusatzwärmetauscher
CH437110A (de) Heisslufttunnel zum Behandeln von zumindest teilweise in Schrumpffolie verpackten Gegenständen
DE69302720T2 (de) Wäschetrockenschrank
US3579849A (en) Heat setting of footwear
US3526967A (en) Pelt drying system
US1893694A (en) Incubator
US4011663A (en) Apparatus for drying fabrics
US2281339A (en) Incubator
JPH02502468A (ja) 織物糸を熱処理する方法および装置
US2294530A (en) Dehydration apparatus
US2884707A (en) Method for drying wood
US2722404A (en) Heat exchanger air circulating system
GB447044A (en) Improvements in or relating to the drying of materials
US969031A (en) Process of and apparatus for drying wet material.
US2723463A (en) Electric drier
US1768455A (en) Fabric-treating machine
US1853419A (en) Process and apparatus for humidifiers
US1605634A (en) Art of drying
US1228240A (en) Furnace and evaporator.
US2080998A (en) Air conditioning apparatus
US1228283A (en) Apparatus and process for drying.
CN219318857U (zh) 一种龙眼烘干箱的热风循环装置
US3326540A (en) Temperature and humidity control system for environmental chambers
DE19743378A1 (de) Hordentrockner