ITTO20010988A1 - ,, APPARATUS FOR THE REALIZATION OF FITTINGS FOR AIR CONDITIONING SYSTEMS, AS WELL AS THE RELATED METHOD OF REALIZATION - Google Patents

Description

Description of the industrial invention entitled:

"APPARATUS FOR THE MAKING OF FITTINGS FOR DUCTS OF AIR CONDITIONING SYSTEMS, AS WELL AS THE RELEVANT MAKING METHOD AND FITTINGS MADE WITH THE SAID APPARATUS"

SUMMARY

An apparatus (1) for making fittings (15; 19; 23) for ducts for conveying air in environmental conditioning systems is described, comprising a base structure (2) on which at least horizontal movement means (5) are provided. , 6) of an insulating panel (P), transversal translation means (7,8,9, 10, V, M) of a tool holder trolley (7).

The feature of the invention consists in the fact that said horizontal movement means (5,6) and said transversal translation means (7) are activated individually and / or in association with each other for the realization of shaped components (15 ', 15C, 15D, 15E; 19A, 19B, 19C, 19D, 19E, 19C ', 19D', 19E '; 23', 23D; 25S, 25C) to obtain at least one fitting (15; 19,23) from said panel insulator (P).

DESCRIPTION

The present invention refers to an apparatus for making fittings for ducts for conveying air in environmental conditioning systems, meaning by environmental conditioning also simple heating and / or ventilation and / or renewal and / or recirculation through filters and / or air vent, as well as to fittings made with said apparatus.

The ducts of air conditioning systems are generally made by using quadrangular or rectangular sections made of insulating material, connected to each other; the sections of these ducts are typically made from rigid polyurethane foam panels, covered with thin aluminum sheets.

To this end, at least three V-shaped grooves are made on a surface of a flat panel of insulating material, which form fold lines; the panel is then folded back on itself, along the aforementioned fold lines, to form the square section stub; suitable angular sealing means (such as glue) are provided to fix together the two terminal sides of the panel, previously chamfered at 45 °, usually along a corner of the section.

The production of the V-shaped grooves can be carried out manually or by means of machines suitable for the purpose such as that described in the Italian patent No. 01270410.

The connection between the various sections is made in a known way, for example with the assembly of sections on the heads of the sections and then the use of other sections, which suitably shaped, are hooked to those mounted on the heads, thus keeping the sections together between They.

The ducts made in this way generally develop on straight paths, both horizontal and vertical, which are connected to each other by means of corner fittings.

In addition, several ducts can depart from a main duct for the distribution of air in other directions; in this case it is necessary to have a connection fitting between the main duct and the ducts derived therefrom.

These connection fittings are made from a flat panel of expanded polyurethane, the same as that used for making the sections of the duct. The realization of these fittings is carried out manually and requires that the operator must trace the shape of the parts to be obtained on the panel; in addition, the operator will have to trace the details on the panel in such a way as to minimize waste to contain costs.

After cutting the details, the operator will always have to manually obtain V-notches for bending and a 45 ° bevel on the edges that will join together, so that the joint is located on the corner.

As can be easily understood, the operation of arranging, tracing, cutting and chamfering of these fittings takes a very long time with consequent increase in costs.

The present invention aims to solve the above problems.

In this general context, the purpose of the present invention is to indicate an apparatus and a method for making fittings for ducts for conveying air in air conditioning systems, made of foam material, in particular polyurethane, which does not have the drawbacks of known art, but on the contrary it presents advantages of functionality and ease of realization.

A further object of the present invention is to indicate a simple and efficient method for making fittings for ducts for conveying air in environmental conditioning systems. Another object of the present invention is to indicate an apparatus in which the realization of the extension of the corner joint is carried out automatically.

One or more of these purposes are achieved, according to the present invention, by an apparatus for making fittings for ducts for conveying air in air conditioning systems, a method for making said fittings, as well as fittings thus made, incorporating the characteristics of the attached claims, which form an integral part of the present description.

Further objects, characteristics and advantages of the present invention will become clear from the following detailed description and from the attached drawings, provided purely by way of non-limiting example, in which:

- Fig. 1 schematically represents a partially sectional side view of an apparatus for making fittings for ducts for conveying air in environmental conditioning systems according to the invention;

- Fig. 2 schematically represents a front view of an apparatus for making fittings according to the invention;

- Figs. 3, 3A and 3B show a view of a first type of connection, in a semi-finished shape and in a final shape, made according to the invention;

- Figs. 4 and 4A show a view of a second type of connection, in a semi-finished shape and in a final shape, made according to the invention;

- Fig. 5, 5A and 5B shows a view of a third type of connection, in a semi-finished form and in a final form, made according to the invention;

- Fig. 6, 6A and 6B shows a partial perspective view of the construction of a section of a duct for conveying air in environmental conditioning systems, with a tapered end, in a semi-finished and final form, in accordance with the apparatus according to the invention.

In Fig. 1, where a partially sectional side view of an apparatus for the construction of fittings for ducts for conveying air in environmental conditioning systems according to the invention is schematically represented, with the number 1 the apparatus is indicated. The apparatus 1 is formed by a base structure 2, formed by two side heads 2A spaced apart and connected to each other by tie rods 3 and a double T-shaped profile 4. With 5 are indicated two rollers connected to the side heads 2A; the rollers 5 are motorized and can rotate in both directions, ie clockwise and anticlockwise.

Reference 6 indicates two idle rollers, each positioned above a motorized roller 5; also the rollers 6 are connected in a known way to the heads 2A. The rollers 5 and 6 are spaced apart in such a way as to allow the passage and dragging of an insulating panel P to be processed. The distance between the rollers 5 and 6 can be varied according to the thickness of the panel P.

7 indicates a tool holder trolley to which a support 8 is solidly connected to the rear; the carriage 7 can move horizontally by means of wheels 9 fixed to the support 8 and sliding on two horizontal shafts 10.

With reference to Fig. 2 where a front view of an apparatus for making fittings according to the invention is schematically represented, 11 and 12 indicate two work units fixed in front of the trolley 7. The two work units 11 and 12 at their lower end they have a tool, namely: unit 11 a conical cutter 13 and unit 12 a cylindrical cutter 14.

The work units 11 and 12 can carry out, independently of each other, a vertical movement for the approach and / or removal of the respective cutter from the panel P to be processed; the movement is obtained by means of a known pneumatic system. The rotation of the cutters 13 and 14 is given to each by its own motor M present in each unit, not shown.

The horizontal translation movement of the carriage 7 is given by a screw V, positioned horizontally with respect to the carriage 7 and connected to it in a known way by means of a nut screw M fixed to the carriage 7.

Screw V is driven by a direct current electric motor through a reducer. The use of a direct current motor is given by the fact of being able to invert the direction of rotation with the simple inversion of the power supply, for the inversion of the direction of translation of the trolley 7.

Downstream and upstream of the apparatus 1 there are support surfaces, not shown in the figures, for supporting the panel P before and during its processing and for supporting the details obtained from the panel P. The apparatus 1 is electrically and hydraulically connected, with methods known per se and therefore not represented, to a programmable and / or preselectable electronic control system, which supervises all the operations necessary for the operation of the apparatus itself.

The electronic control system contains in its memory a plurality of types of fitting, with the possibility of adding others, where the dimensions are given by the operator of the apparatus at the start of processing for the construction of the fitting.

With reference to Fig. 3, 3A and 3B where a view of a first type of fitting is shown, in a semi-finished shape and in a definitive form, made according to the invention, the number 15 indicates a two-way fitting suitable for to the connection between them of two ducts for conveying air in environmental conditioning systems.

The fitting 15 is formed by a portion of duct 16 from which a second portion of duct 17 branches off laterally for connecting the fitting 15 to the second duct.

The connection 15 is made from a development 15 'formed by a base 15A and two equal walls 15B which will be in a perpendicular position to the base 15A and connected to it by the aluminum sheet covering the panel from which the connection is made.

An appendix 17A departs from each of the two walls 15B for the construction of the connection section 17 for connection with the second duct. In this specific case the second duct has smaller dimensions than the first duct from which it derives.

To avoid choking on the passage of air and improve its conveyance in the second duct, the appendix 17A has the external wall 17B of semicircular shape and ending beyond the edge of the wall 15B.

To complete the connection 15, three bottoms are then necessary for the realization of the lateral closure of the connection 15, indicated respectively with 15C, 15D and 15E. Reference 18 indicates 90 ° V notches for the 90 ° bending of the side walls 15B with respect to the base 15 (see Fig. 3A and 3B).

The edges of the walls 15B and of the appendages 17A, which must be connected to the edges of the bottoms, have a 45 ° bevel so as to couple with the same bevel present on the edges of the bottoms, so as to achieve the union on an edge of the fitting.

The connection of the bottoms 15C, 15D and 15E to the side walls 15B and to the appendages 17A is achieved by means of adhesives.

With reference to Fig. 4 and 4A where a view of a second type of fitting is represented, in a semi-finished form and in a definitive form, made according to the invention, the number 19 indicates a three-way fitting suitable for connection between them of three ducts for conveying air in environmental conditioning systems.

The fitting 19 is formed by a portion of duct 20 from which a duct section designated respectively by 21 and 22 for connecting the fitting 19 to a second and a third duct, respectively, branches off laterally from each of the two lateral sides.

The fitting 19 has two symmetrical bases indicated respectively 19A and 19B, from which two appendages, indicated respectively by 21A and 22A, branch off laterally, for the realization of the portions of duct 21 and 22 for the connection of the fitting 19 with the second and third duct. In this specific case, the second and third ducts have different dimensions from each other and different from those of the first duct from which they derive.

Also in this case, to avoid bottlenecks in the passage of air and improve its conveyance in the second and third ducts, the appendices 21 A and 22A have the external wall 21 B and 22B with a curved shape and ending beyond the edge of the bases 19A and 19B.

The two bases 19A and 19B are connected to each other by six bottoms respectively indicated with 19C, 19D, 19E, 19C, 19D 'and 19E', for the lateral closure of the fitting.

Also in this case the edges of the bases 19A and 19B as well as of the appendages 21A and 22A, which must be connected to the edges of the bottoms, have a 45 ° bevel so as to couple with the same bevel present on the edges of the bottoms in order to create the union on an edge of the fillet.

The connection of the bottoms 19C, 19D, 19E, 19C, 19D 'and 19E' to the bases 19B and to the appendices 21 A and 22A is made by means of adhesives.

With reference to Fig. 5, 5A and 5B where a view of a third type of fitting is represented, in a semi-finished form and in a final form, made according to the invention, the number 23 indicates a fitting suitable for connection between a main duct and a derivation duct for conveying air in environmental conditioning systems.

The connection 23 has a development 23 'formed by a base 23A and two equal walls 23B perpendicular to the base 23A and connected to it by the aluminum sheet covering the panel from which the connection is obtained. The walls 23B have one end with a height greater than the other connected to each other by a straight section 23C and an inclined section 23D. The end of greater height is present on the side of the fitting that must be connected to the main duct. To complete the fitting 23, a second base 23D is then required to make the fitting closure. Reference 24 indicates 90 ° V notches for the 90 ° bending of the side walls 23B with respect to the base 23A (see Fig. 5A and 5B).

Also in this case the edges of the base 23A which must be connected to the edges of the second base 23D have a 45 ° bevel so as to be coupled with the same bevel present on the edges of the second base 23D in order to achieve the union on an edge of the fitting.

The connection of the second base 23D to the side walls 23B is achieved by means of adhesives.

Returning to Fig.3A, according to the known art, for the realization of the joint 15 it is necessary to trace on a panel P the development of the joint and the three bottoms and then cut the profile and the notches by hand for the bending of the side walls; in addition, the 45 ° bevel of the edges of the side walls must always be carried out by hand, which must be connected to the edges of the bottoms, which are in turn beveled at 45 °, to close the duct. In addition, the operator must trace the development of the fitting and the bottoms on panel P in order to minimize the processing waste.

These operations must be carried out for each type and size of connection to be made and therefore, as previously mentioned, require time and consequently a higher cost.

For the realization of the fitting 15 according to the present invention, one proceeds as follows; we start by giving the electronic control system the following parameters:

- the type and dimensions of the fitting to be made in such a way that the electronic control system can establish the arrangement on the panel P of the components of the fitting in the most rational way possible to reduce the processing waste to a minimum;

- the thickness of the panel P so that the control system can establish the distance between the motorized rollers 5 and the idle rollers 6 in order to be able to drag and / or push the panel during processing;

the processing phase for the realization of the fitting and the related components is then activated, through the electronic control system, namely:

- the motorized rollers 5 are activated,

- the carriage 7 is positioned so that the tool 14 of the unit 12 is positioned at the starting point for the machining, for example near an edge S of the fitting to be made, - the panel P is inserted between the first pair of rollers 5 and 6, which drive it towards the tool 14,

- the rotation of the tool 14 is activated and the unit 12 is lowered so that the tool 14 is in a position with its end in such a way as to be able to make a through cut in the panel P, - following the indication of the arrow F in Fig.3A, the electronic control system advances the panel P for cutting the first flat section of the profile of the fitting to be made starting from the edge S and following the path indicated by arrow F, it is then also activated moving the carriage 7 to create the next curved section with the two combined movements; once the curved section has been completed, the advancement of the panel is stopped and only the carriage 7 will be moved to create the horizontal flat section of the appendix 17A; at the end of the horizontal flat section, the movement of the carriage 7 is stopped and the panel is made to move forward in order to create the flat section of the edge of the end of the appendix 17A, when the advancement of the panel P is stopped and it is activated the displacement of the carriage 7 in the opposite direction to the previous one, to make the second horizontal section in the plane of the appendix 17A, at this point the horizontal displacement of the panel P is also activated, in the opposite direction to the previous one, to make the semicircular part 17B of the appendix 17A, the displacement of the panel P is stopped, keeping the carriage 7 in motion, to create the flat section at the bottom of the curvature 17B; the movement of the carriage 7 is stopped, the displacement of the panel P is activated, in the opposite direction to the previous one, to create the following flat section, after which the movement of the carriage 7 in the opposite direction of the previous one is activated, in order to make the section inclined following; at the end of the inclined section the movement of the carriage 7 is stopped, keeping the movement of the panel P active, to make the final section up to the edge S1 where the movement of the panel P is also stopped as the profile of a wall of siding 15,

- the tool 14 is raised so as to be able to move it, by means of the carriage 7, to the starting position of the cut of the profile of the second wall of the fitting 15, during the movement of the carriage 7 the movement of the panel P is activated in order to position it with the edge S2 in correspondence with the tool 14,

- to cut the profile of the second wall of the fitting 15, proceed in the same way as previously described, but with opposite movements of the carriage 7,

- after cutting the profile of the second wall, the carriage 7 is positioned with the tool 13 at the point where the first notch 18 is to be made,

- the rotation of the tool 13 is activated and the unit 12 is lowered so that the tool 13 can meet the panel P and make the notch 18, the depth of the notch 18 is such as to reach the lower sheet of aluminum of the panel cladding P without affecting it,

- the advancement of the panel P is activated for a time sufficient to make the notch 18 for the entire length of the fitting 15, - the first notch 18 has been made, the tool 13 is moved to the position for making the second notch 18, proceeding then as for the realization of the first carving,

- the tool 13 is then positioned first on the edge S and then on the edge S2, and with the movements of the carriage 7 and the movements of the panel P, as previously described, a 45 ° chamfer is made on the edge of the previously cut external profile , - the tool 13 is brought into the rest position and the tool 14 is activated for cutting the two sides of the profile of the duct 15, delimiting its length, and detaching it from the panel P.

It goes without saying that for the realization of the second profile of the extension of the joint 15, instead of starting from the edge S2, it is possible to start from the opposite edge by proceeding in the opposite direction with respect to the cut of the first profile.

After detaching the extension of the joint 15, the bottoms 15C, 15D and 15E are obtained from the panel P, in the same way in which the extension of the joint 15 was made, both for cutting the profile and for making the chamfer.

According to the dimensions of the connection 15, from the panel P several developments and more bottoms can be obtained up to the complete use of the panel P. Various operations are carried out when the connection 15 and the bottoms 15C, 15D and 15E exit from the apparatus 1. for the completion of junction 15 and precisely:

- by means of the notches 18 the two side walls 15B are bent at 90 ° with respect to the base 15A, after inserting in the notch 18 the sealing material to the leakage of the air from the whole to the outside of the duct 15, for example the glue,

- the bottoms 15C, 15D and 15E are suitably shaped by means of tools known per se and therefore not described, according to the profile of the development that they must close,

- the same sealing and gluing material is applied to the beveled edges and then applied to the relative portions of the duct to be closed.

The duct 15 is thus completed and ready to be used. Similar operations are carried out to obtain the fittings shown in Figures 4, 4A, 5, 5A and 5B.

From the above description the advantages of an apparatus for making fittings for ducts for conveying air in environmental conditioning systems, as well as fittings made with said apparatus according to the present invention, are also clear.

In particular, they consist in the fact that:

- the realization of the connection is obtained in a simple and rapid way; - making the fitting has advantages in terms of saving time and consequently with a reduction in costs;

- the connection is made automatically;

- the realization of the connection is obtained with an optimal exploitation of the dimensions of the polyurethane sheet;

- it is possible to create fittings with different external and / or internal dimensions by simply inserting the dimensions in the electronic control system.

It is clear that numerous other variants and applications are easily made and used by the man of the art, to the apparatus for the construction of fittings for ducts for conveying air in environmental conditioning systems as well as fittings for ducts for conveying air in air conditioning systems described as an example.

For example, the construction of a section of a duct for conveying the air that must be connected to a duct with a smaller section as shown in Fig. 6, 6A and 6B.

In Fig. 6 the section 25 is partially indicated in the final embodiment, in Fig. 6A the development of the tapered end of the section 25 is indicated.

The section 25 is made of a base 25A and two equal walls 25B which will be perpendicular to the base 25A and connected to it by the aluminum sheet covering the panel from which the section is obtained.

For the completion of the section 25, an upper bottom is then necessary for the realization of the closing wall of the section 25, indicated with 25C.

Reference 26 indicates 90 ° V notches for the 90 ° bending of the side walls 25B with respect to the base 25A (see Fig. 6A and 6B).

The edges of the walls 25B that must be connected to the edges of the upper bottom 25C, have a 45 ° bevel in order to couple with the same bevel present on the edge of the bottom itself, in order to achieve the union on one edge of the section.

The construction of the section 25 takes place in the same way as the construction of the connection 15, i.e. with the combination of the reciprocal motion of the panel-tools in two orthogonal directions, having taken care to insert the shape and size data of the section 25 to be in the electronic control system. to achieve.

It is clear that numerous other variants and applications can be easily made and used by the man skilled in the art, to the apparatus for making fittings for ducts for conveying air in environmental conditioning systems as well as fittings for ducts for conveying air. air in conditioning systems described as an example, just as it is clear that in the practical embodiment of the invention the shapes and dimensions of the components may be different and the same may be replaced with technically equivalent elements.

Claims (1)

CLAIMS 1. Apparatus (1) for making fittings (15; 19; 23) for ducts for conveying air in environmental conditioning systems comprising a base structure (2) on which at least - horizontal handling means (5,6) of an insulating panel (P), - transversal translation means (7,8,9,10, V, M) of a tool trolley (7), characterized by the fact that said horizontal movement means (5,6) and said transversal translation means (7,8,9, 10, V, M) are activated individually and / or in association with each other for the realization of shaped components (15 ', 15C , 15D, 15E; 19A, 19B, 19C, 19D, 19E, 19C ', 19D', 19E '; 23', 23D; 25S, 25C) to obtain at least one fitting (15; 19; 23) from said insulating panel (P) 2. Apparatus according to claim 1, characterized in that said horizontal movement means (5,6) comprise at least one pair of rollers (5,6). 3. Apparatus according to claim 2, characterized in that said pair of rollers (5,6) comprises at least one motorized roll (5). 4. Apparatus according to claim 3, characterized in that said motorized roller (5) is able to rotate in both directions for the movement of said panel (P). 5. Apparatus according to claim 1, characterized in that said transversal translation means (7,8,9, 10, V, M) comprise a carriage (7) suitable for a transversal translation in both directions. 6. Apparatus according to claim 5, characterized in that said trolley (7) comprises at least a first (11) and a second working unit (12) suitable for vertical movement. 7. Apparatus according to claim 5, characterized by the fact that said first working unit (11) comprises at one end a tool (13) suitable for removing material. 8. Apparatus according to claim 5, characterized in that said second working unit (12) comprises at one end a tool (14) suitable for cutting. 9. Apparatus according to claim 8, characterized in that said tool (14) comprises a cylindrical cutter (14) suitable for making the extension of said fitting (15; 19; 23). 10. Apparatus according to claim 7, characterized in that said tool (13) comprises a conical cutter (13) suitable for making notches (18; 22; 26) and chamfering of the edges for the development of said fitting (15; 19; 23). 11. Apparatus according to claim 5, characterized in that the transverse translation of said carriage (7) is achieved by means of a screw (V) driven by an electric motor, in particular with direct current. 12. Apparatus according to claim 11, characterized in that said screw (V) is associated with a nut screw (M) integral with said carriage (7). 13. Apparatus according to claim 1, characterized in that all the operations of said apparatus (1) for the realization of said connection (15; 19; 23) are controlled and managed by an electronic control system. 14: Method for making fittings (15; 19; 23) for ducts for conveying air in environmental conditioning systems using an apparatus according to one or more of the preceding claims. 15. Method according to the preceding claim, characterized in that it comprises a first step for entering data in said electronic control system, a second step for producing the shaped components of said fitting (15 ', 15C, 15D, 15E; 19A, 19B, and a third step of making said connection (15; 19; 23). Method according to the preceding claim, characterized in that in said first step the following data are entered in the electronic control system: - type and dimensions of the fitting (15; 19; 23) to be made, - the thickness of the panel (P) from which the connection must be obtained (15; 19; 23). 17. Method according to claim 14, characterized in that said second step of manufacturing the shaped components (15 ', 15C, 15D, 15E; 19A, 19B, 19C, 19D, 19E, 19C', 19D ', 19E'; 23 ', 23D; 25S, 25 C) of said fitting (15; 19; 23) comprises: - activation of the motorized rollers (5), - positioning of the carriage (7) so that the tool (14) of said second unit (12) is positioned at the starting point for the realization of one side of a shaped component (15 ', 15C, 15D, 15E; 19A, 19B, 19C, 19D, 19E, 19C', 19D ', 19E'; 23 ', 23D; 25S, 25C) of said connection (15; 19; 23), - insertion of the panel (P) between the first pair of rollers (5,6), which drive it towards said tool (14) of said second working unit (12), - activation of the rotation of said tool (14) and lowering of the second unit (12) to bring said tool (14) into position for making a through cut in the panel (P), - advancement and / or retraction of the panel (P) by means of the pairs of rollers (5,6), - activation and / or deactivation of the transverse movement in one or the other direction of said carriage (7), - positioning of said tool (14) in the starting point of the cut of the profile of the second side of the extension of said joint (15; 19; 23), - advancement and / or retraction of the panel (P) by means of the pairs of rollers (5,6), - activation and / or deactivation of the transverse movement in one or the other direction of said carriage (7). 18. Method according to claim 17, characterized in that it further comprises: - positioning of the tool (13) of said first work unit (11) at the starting point for making a first notch (18; 22; 26), - activation of tool rotation (13) and lowering of the second working unit (12), - activation of the advancement of the panel (P) for a time sufficient for the realization of said first notch (18; 22; 26), - making a second notch (18; 22; 26) parallel to said first notch (18; 22; 26), - positioning of the tool (13) on the profile of a first side of the development for the creation of a chamfer on the edge of the profile, - positioning of the tool (13) on the profile of the second side of the development for the creation of a chamfer on the edge of the profile, - activation of the tool (14) of said second working unit (12) for cutting the third side and subsequently the fourth side for detachment from the panel (P). 19. Method, according to claim 15, characterized in that said third step of making said duct (15; 19; 23) comprises: - sealing of said notches (18; 22), - lateral side bending (15B, 23B) by means of said notches (18; 22), - component shaping (15C, 15D, 15E; 23D), - assembly of components (15C, 15D, 15E; 23D) by gluing. 20. Method according to claim 18, characterized in that said notches (18; 22; 26) have a depth such as to reach a lower sheet of aluminum covering of said panel (P) without affecting it. 21. Method according to claim 16, characterized by the fact that said electronic control system establishes the arrangement on the panel (P) of the components (15 ', 15C, 15D, 15E; 19A, 19B, 19C, 19D, 19E, 19C', 19D 19E '; 23', 23D; 25S, 25C) of the fitting (15; 19; 23) to minimize processing waste. 22. Fitting (15; 19; 23) for ducts for conveying air in environmental conditioning systems obtained with the apparatus and / or method according to the previous claims. 23. Apparatus and / or method for making fittings for ducts for conveying air in air conditioning systems, as well as a fitting thus made, as shown in the present description and in the annexed drawings.