US1694489A

US1694489A - Machine for drying veneers

Info

Publication number: US1694489A
Application number: US223331A
Authority: US
Inventors: Rubinstein Leo
Original assignee: Individual
Current assignee: Individual
Priority date: 1926-10-09
Filing date: 1927-10-01
Publication date: 1928-12-11
Anticipated expiration: 1945-12-11

Description

Dec. 11, 1 928.

5 Sheets-Sheet 1 L f'bbn nsl'eu n INVENTOR 4, ATTORNEK L RUBINSTEIN MACHINE FOR DRYING VENEERS Filed Oct. 1, 1927 L. RUBINSTEIN MACHINE FOR DRYING VENEERS Dec. 11, 1928.

5 Sheets-Sheet 2 we Q Med Oct. l,

Leo @bmsfel n INVE/V T01? BY L 4. ATTORNEY.

Dec. 11, 1928. 1,694,489

L. RUBINSTEIN MACHINE FOR DRYING VENEERS Filed Oct. 1, 1927 5 Sheets-Sheet 3 Leo @binsl' m INVENTOR 6. A TTOR/VE Y.

Dec. 11, 1928, 1594 489 L. RUBlNSTElN MACHINE FOR DRYING VENEERS Filed Oct. 1, 1927 5 Sheets-Sheet Fig.6

ATTORNEY Dec. 11, 1928. r 1,694,489

L. RUBINSTEIN MACHINE FOR DRYING VENEERS Filed on; 1, 1927 5 Sheets-Sheet 5 Fig. 10

Leo Ruin nskem IIVVENTOR 4 ATTORNEY.

Patented Dec. 11,1928.

UNITED sraras LEO RUBIN STEIN, 0F VIENNA, AUSTRIA.

MACHINE FOR DRYING VENEERS.

Application filed October 1, 1927, Serial 110.223331. and in Austria OctoBer 9, 1926.

The invention relates to a machine for drying veneers in which the drying is effected by means of moving heaters. Heretofore the dryingof veneers by means of moving heaters was effected in such a manner that the moving heaters were moved along-stationary veneers or piles of veneers. This method of drying requires many hand OPGIZLtlODS and implies a great expenditure in time and labour.

The object of the invention is to carry out the drying of veneers-by means of moving heaters in a simple and reliable manner by a machine and to provide a machine capable of reliably drying veneers of different lengths and thicknesses as well as of different degrees of moisture with the best drying results. This object is attained according to the invention by providing the machine with devices for moving theveneers along the moving heaters.

1n the drawings a constructional form of the machine is illustrated by way of example.

Fig.1 is a side elevation and Fig. 2 is a plan View of the machine. Fig. 3 is an elevation partly in section on a larger scale. of the mechanism for feeding the veneers and of the arrangement of the heaters. Fig. 4 is a section on the line IV-IV Fig. 3. -Fig. 5 is a section on the line VV Fig. 3. Figs. 6 and 7 show the heater in side elevation and plan view respectively. Fig. 8 is a section on the line VIIIVIII' Fig.- 6 on a larger scale.

Fig. 9 is a side elevation on a larger scale of the cooling apparatus provided at the end of the machine. Fig. 10 is a plan view of Fig. 9.

The machine comprises a plurality of mov:

ng heaters

1, 2, 3, 4, 5, 6 past which the veneers to be dried are moved. 10, 11, 12, 13,

14,15,16 and 20, 21, 22, 2a, 24., 25 are mechanlsms for moving the veneers past the movmg heaters 1 to 6. These mechanisms consist of

feeding devices

10, 11, 12, 13, 14, 15, 16 engaging the veneers and of

guides

20, 21, 22, 23, 24,25 for the veneers. The guides 20 to 25 are arranged opposite the moving heaters 1 to 6. The moving heaters 1 to 6and the guides 20 to 25 are arranged between the feeding devices 10 to 16. 3

In the constructional form shown byway of example the heaters 1 to 6, the feeding devices 10 to 16 and the guides 20 to 25 resemble each other respectively, hence it is suflicient to describe only one of each of these elements.

As is more particularly shown in Fig. 3 the slidable in the standards feeding. devices 10 to 16 consist each of a pair of

rollers

30, 31 having their

axles

32, 33

journalled 1n bearings

34, 35. The bearings 34,

suspended on the longitudinal beams 45, 46'

by means of rods 43, 44. The

longitudinal beams

45, 46 are connected by transverse bars 48 to form a slide'in' the form of a frame. This slide forms the support for all the heating blocks and is reciprocated by an actuating gear 50 as hereinafter more fully described. Rollers 52 are loosely mounted on the transverse bars 48; these rollers run on the guides 53. The guides 53 are vertically 36 for the bearings and areprovided as is shown in Fig. 3 with adjusting inclines 55- resting on inclines 56 of an adjustingframe 58 parallel to the direction of the feed. The adjusting frames are movably mounted in guides 60 of the standards 36for the bearings and are so connected with each other by'rods 61 that all,

I the adjusting frames may be adjusted from a single point.

The mechanism for operating the adjusting frames 58 consists of a hand wheel 63 to the shaft 64 of which worms 65 are secured. The worms65 engage into worm Wheels 66 cooperating with actuating screws 67. The actuating screws 67 are connected by the rod 61 to the adjusting frames 58. By means of.

the mechanism above described the guides for the

slide

45, 46, 48 on which the heating blocks 40 are suspended may be adjusted vertically whereby at the same time the heating blocks 40 are adjusted relatively to the guidesQO to 25 for the veneersl.

The heating blocks 40 are resiliently yieldingly mounted relatively to the guides 20 to 25 of the feed waylocated opposite such heating blocks. For this purpose the suspending rods 43', 44 (Figs. 4 and 5) are slidably mounted in supporting sleeves .70 of the

longitudi nal beams

45, 46 and are held above such sleeves 70 by springs 72. The one of the through the heating blocks and communi-' or 4 1 and secured to the heating block 40 by screws 78. By turning the spring abutment 76 each heating block may be nicely adjusted vertically. By turning the nuts 74, that is to say by adjusting the other spring abutment 73 the tension of the spring 72 may be adj sted.

The heating blocks 40 are provided with heating devices. In the example shown the heating device consists of a steam duct.

Channels

80, 81 extend longitudinally cate with each other at one side of the heating block b a connecting pipe 82. At the other side of each heating block connecting pieces or

ajutages

83, 84 are provided for establishing communicatio n with the admission and escape of the heating agent. In the example shown the heating blocks 40 are made of some light metal. The

channels

80, 81 through which flows the heating agent are formed by

tubes

86, 87 of a metal higher specific weight such as brass, iron or the like embedded in the body 40 of light metal. The operative heating surface of each heating block is provided with a covering 88 likewise made of a metal of higher specific gravity for instance of brass.

The covering 88 is secured to the light metal block in any suitable manner for instance by screws. The longitudinal edges 89, 90 of the covering 88 are inclined upwards so that the veneer running through the machine may slip in below the covering 88 without stickmg. I

The guides 20 to 25 arranged opposite the moving heaters are provided with plane guide faces 95. The parts 96, 97 of the side edges in the neighbourhood of the pairs of feed rollers are bevelled downwardly. Thereby a smooth running" up of the veneer onto the guide faces is secured. The guides are provided with chambers100, 101 for introducing thereinto a heating agent for instance steam. In the example shown each guide is provided with two steam chambers" 100, 101 which on the one side communicate with each other by an opening in the partition 102. On the other side of the

heating chambers

100, 101

holes

104, 105 are pro- Vidvd i'or the admission and the escape of the heating agent. The guides are interposed v: means of

screws

110, 111, 112, 113 between thestandards 36 for the bearings of the pairs of eml rollers in the manner illustra ed in Fig. 3. The mode of securing the guides in position permits of a nice adjustment of the sunrrelatively to the bottom feed rollers and thereby also a nice adjustment of the feed pat h of the machine. I

The heating of the heaters 1 to 6 and of the guide 23 are connected by

ducts

125, 126, 127

and 128, 129 respectively with the

guides

22, 21, 20 and '24, 25 respectively .while the heaters are connected with one another. be ginningwith the middle heater by 00111111111111? eating

ducts

123, 132, 133, 134, 135. The,

heating agent escapes from the guide 20 through a duct 137, from the guide 25 through a duct 138, from the heater 1 through the flexible'hose 139 and fromtheheater6through the flexible hose 140. 141 designates the heat ing agentescape duct common to heaters and guides. The fact, that heating agent flowing in succession through the guides and heaters beginning with the middleguide 23 and the middle heater,secures that the temperature of the heaters and of the guides is lower at the beginning and at the end of the feed path than in its'middle';

The machine is further provided with a cooling apparatus, which eifects' a cooling of the heated veneers dried in the machine. The cooling apparatus consists as is shown in Figs. 1 and 2 of feeding devices 17 ,18 and of cooled guides 26, 27 for the veneers. The feeding devices 17, 18 are similar in construction to the feeding apparatus 10 to 16 and consists of pairs of

rollers

150, 151 journalled in standards 152. The

guides

26, 27 consistof plane guide plates 155 having arranged below them cooling channels for instance a cooling coil 157. The cooling coils of the

guides

26, 27 communicate with each other by a connecting pipe 190. 191 is the supply duct for the cooling agent, 192 is the escape duct therefor.

The driving mechanism 01am machine consists 'of a driving gear 50 for bringing about the reciprocating movement of the heaters. The driving gear for the pairs of feed rollers consists of a step pulley the shaft 161 of which carries a worm 162. The worm 162 engages into. a worm wheel 163 secured toa shaft 165 journalled laterally of the bottom rollers of the pairs of feed rollers. On the shaft 165 bevel wheels 166 are mounted which cooperate with bevel wheels 167 of the

bottom rollers

31 and 151 respectively. The rotary movements of the bottom rollers '31. and 151 respectively are transmitted to the top rollers by means of pairs of spur-wheels 170,171. r

The driving gear of the heaters 1 to,6 conmemes sists of two crank gears 50 connected by links 17 5 to the

longitudinal beams

45, 46 of the slide carrying the heaters 1 to 6. The cranks 50 are mounted on a shaft 176 carrying the step pulley '177 and a belt pulley 178 and an idle pulley 17 9. The step pulley 177 drives the step pulley 160 by means of a belt 180.

On actuating the pulley 178 on the one hand the cranks 50 and on the other hand the pairs of feed rollers are revolved through the medium of the

parts

177, 180, 160, 161, 162, 163, 165, 166, 167. The cranks 50 bring about reciprocating movements of-heaters 1 to 6. In these reciprocating movements the heaters are exactly guided by the

rollers

52, 52. The veneers to be dried are introduced into the first pair of feed rollers and are en-' gaged successively by the feed roller pairs and fed. The onward moving veneers are guided in the spaces between successive pairs of feed rollers by the heated guides 20 to and then a by the cooledguides'26 and 27. The heaters 1 to 6 are reciprocated by means of the cranks 50 above the veneers thus moving them onward and bringing about the drying of the veneers. The heaters may either be in contact with the veneers or may exert their drying action while moving at a slight distance from the veneers. In the present machine the veneers therefore move between the reciprocating heated heaters 1 to 6 and the stationary likewise heated guides 20 to 25.

The temperature of the heaters and heated guides at front end in the direction of the feed of the veneers being lower than that of the heaters and heated guides in the middle of the feed path, the drying is not sudden hand wheel 63 all the adjusting inclines 58 are displace-d horizontally their adjusting faces 56 slide on the adjusting faces 55 and cause the guides 53 for the rollers 52 of the

slide

45, 46, 48 to be raised or lowered. By adjusting the spring abutment nuts 76 each in-' dividual heating block could be adjusted vertically. The step pulley gearing 177, 180, 160 permits to govern the speed of the forward movement of the veneers relatively to the movements of the heaters and therefore to control the drying.

The machine shown in the drawings is only an example of carrying the present invention into practice. The details of the machine much lower than those, of the known veneer drying machlnes.

What I claim is:

1. Ina machine for drying veneers, the

combination of heaters, means for moving the heaters'in the direction ofthe veneers, and means for feeding the veneers to be dried past the said heaters along a feed path.

2. In a machinefor drying veneers the combination of heaters, means for moving the heaters in the direction of the veneers, and

means for feedingthe veneers to be dried past the said heaters along a feed path, such latter means comprising guides located opposite the said heaters and a plurality of feeding devices adapted to engage the veneers guides might be of any each of such feeding devices being interposed between two successive guides. 3. In a machine for drying veneers the combination of heaters, means for moving the heaters and means for feeding the veneers to be dried past the said heaters along a feed path such latter means comprising a plurality of guides located opposite the said heaters, means for heating the said heaters and guides and. means for keeping the temperatureof the heaters and guides in themiddle of the feed path at a higher level than at the ends of such feed path. 4. In a machine for drying veneers th combination of heaters, means for moving the heaters and means for feeding the veneers to be dried past the said heaters along a feed path such latter means comprising apluralityof guides located opposite the said heaters heating chambers individually associated to the said guides means for connect ing in series the heating chambers of the said guides beginning at the middle'of the said feed path and ending at the ends of such feed path and "means for supplying a fluid heating agent tothe heating chambers at the middle of the feed path and for drawing off the heaping agent atthe ends of the said feed pat 5. In a machine for drying veneers the combination of heaters, means for moving the heaters andmeans for feeding the veneers to be driedpast the-said heaters along afeed path, such latter means comprising a plural- .ity of guides located opposite the said heaters and means for adjusting all the heaters simultaneously relatively to-the said guides. 6. In a machine for'drying veneers the combination of heaters, means for moving the heaters, means comprising a slide carrying the heaters, guides for such slide and means for adjusting the said slide .g ides, with means for feeding the veneers past the said heaters along a feed path.

7. In a machine for drying veneers th combination of heaters, means for moving the heaters, such means comprising a slide carrying the heaters, guides for such slide and means for adj ustingthe said slide guides,

I such adjusting means comprising inclines on the slide guides adapted to engage with the inclines on the said slide and means for simultaneously adjusting the slide inclines,v

with means for feeding the veneers past the said heaters along a feed path.

8. In a machine for drying veneers the combination of heaters, means formovingthe heaters, such means comprising a slide consisting of longitudinal beams, transverse bars connecting such longitudinal-beams means for suspending the said heaters on the said. longitudinal beams, with guides; for the slide, such guides being adapted to cooperate: with the said transverse bars, and means for feedinr the veneers past the said heaters along a feed path.

9. In a machine for drying veneers the combination of heaters, means for heating such heaters, comprising heating channels adapted to receive a heating fluid, connections between the heating channels of successive heaters connecting such channels in series beginning at the middle heater and ending at the end heaters of the series, a supply pipe for fluid heating agent leading to the middle heater and escape pipes for the fluid heating agent from the end heaters and of means for feeding the veneers past the said heaters alonga feed path. 1 a

" 10. 'In a machine for drying veneers the combination of heaters, means for moving the heaters 1n the directlon of the veneers passing through the machine, and means for feeding the veneers to be dried past'the said heaters along a feed path and of a cooling device for the veneers located at one end of the feed path.

11. In'a machine for drying veneers thecombination of heaters, means for moving the heaters and means for feeding the veneers to be dried past the said heaters along a feed path and of a cooling device for the veneers located at one end of the feed path such cooling device comprising a feed device and plates provided with channels for a cooling agentto:

pass through such cooling plates being ar;-

of successive cooling plate "being connected.

with each other.

13. Ina machine for drying veneers the combination of heaters, means for moving the heaters and means forfeeding the veneers to be dried past'the said heaters along a feed path and means for varying the speed of the feed of the veneer with relation to the speed of movement of the heaters.

' In testimony whereof I aifix my signature.

Inc. LEO RUBINSTEIN;